Marcel Danesi Ph.D.

7 Puzzles to Challenge Your Critical Thinking

Can you spot the connections and sort these items.

Posted March 5, 2015 | Reviewed by Ekua Hagan

Forster Forest/Shutterstock

The theme of this post is critical thinking—and the kinds of puzzles that can be constructed around it. This term is used frequently in psychology and education . There are various definitions, but the one that best suits our purpose and which is, in the end, perhaps the best, is the ability to comprehend the logical connections among ideas, words, phrases, and concepts . In the relevant scientific literature, of course, the term is used much more broadly as a framework for understanding human cognition . But in my opinion, the best way to understand things is to construct puzzles to illustrate their basic essence.

Critical thinking involves skill at recognizing a pattern in given information and especially recognizing how the information is connected to the real world. Here are a couple of very simple examples. First, consider the five words below:

  • Cruise ship
  • Walking on foot
  • Automobile (not a race car)

Now, put them in order from the slowest to the fastest, when they are going at maximum speed. The solution, of course, is: 4-2-5-1-3.

As with all such puzzles, there might be slightly different solutions—one could claim that some automobiles go faster than cruise ships. This “indeterminacy” characterizes this kind of thinking. However, some puzzles are straightforward. For instance, what do the following five things have in common?

The answer? These are all words referring to shades of blue.

The seven puzzles below are to the ones above, though hopefully more challenging. Some involve knowledge of facts, but critical thinking is still involved in such cases because the organization of the facts according to some principle is always involved—for example, a puzzle may ask you to put five items in order of their dates of invention.

The following tongue-in-cheek definition of critical thinking by Richard W. Paul, a leading expert on critical thinking theory, says it all: “Critical thinking is thinking about your thinking while you’re thinking in order to make your thinking better.”

I. What do the following 5 things have in common?

  • Orange juice

II. Put the following buildings or structures in order of height, from the shortest to the tallest.

  • Typical camping tent

III. What do the following animals have in common?

IV. Put the following inventions in order from earliest to most recent.

V. What feature do the following words have in common?

  • Imagination

VI. Put these bodies of water in order in terms of volume, from smallest to largest .

VII. What do the following landmasses have in common?

I. They are all drinkable liquids. II. 5-1-4-3-2 III. They all have a tail. They are also all quadrupeds. IV. To the best of my knowledge: 5-4-3-1-2 V. They start with a vowel: a, e, i, o, u VI. 4-2-1-5-3 VII. They are all peninsulas.

Marcel Danesi Ph.D.

Marcel Danesi, Ph.D. , is a professor of semiotics and anthropology at Victoria College, University of Toronto. His books include The Puzzle Instinct and The Total Brain Workout .

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Critical Thinking and Decision-Making  - Using Brain Teasers to Build Critical Thinking Skills

Critical thinking and decision-making  -, using brain teasers to build critical thinking skills, critical thinking and decision-making using brain teasers to build critical thinking skills.

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Critical Thinking and Decision-Making: Using Brain Teasers to Build Critical Thinking Skills

Lesson 4: using brain teasers to build critical thinking skills.


Using brain teasers to build critical thinking skills

Here's a brain teaser: A rooster is on the roof of a barn facing east. The wind is blowing to the west at 10 miles per hour. The rooster lays an egg. Which direction does the egg roll?

The answer appears below the image.

an illustration of a rooster on the roof of a barn with an egg at its peak

Answer: There is no egg. The rooster didn't lay one because roosters are male. Did you get it right? Let's pick this apart and see why so many people have difficulty with this brain teaser, and so many others.

Watch the video below to learn more about how you can use brain teasers to improve your critical thinking.

The answer is in the details

It's easy to overlook details or accept them without questioning. In the brain teaser above, the answer could be found in the second word: r ooster .

an illustration of a rooster looking for an egg in its nest

In hindsight, we realize it's impossible for roosters to lay eggs. But it's easy to overlook this when it's casually mentioned in the brain teaser.


Another process at work in this brain teaser is misdirection . There were several details included that we may have paid too much attention to: The fact that the rooster was facing east, and that the wind was blowing west at 10 miles per hour.

an illustration of a rooster facing east and the wind blowing west at 10mph

In the end, these details had nothing to do with the actual answer. However, they seemed important in the context of the brain teaser! This directed us away from the relevant information.

Applying these ideas to the real world

The same techniques we use to solve brain teasers can also be applied to real-world situations . When you're trying to figure something out, it's important to analyze the information that's available to you and ask the following questions:

  • Are there any key details I may be missing?
  • Am I being misled by something?
  • Could I be thinking about this in another way?

an illustration of someone asking themselves questions

Brain teasers not only help to keep your mind sharp, but can help improve your critical thinking skills as well.

Let's finish things off with another brain teaser...

You are in a dark room with a single match. The only objects available to you are a candle, an oil lamp, and a gas stove. Which item do you light first?

illustration of a dark room with a candle, an oil lamp, and a gas stove

Answer: The match!





Embrace the Path of Intellectual Growth

critical thinking brain teasers

Boost Your Mind: Critical Thinking Brain Teasers to Challenge You

Welcome to the world of critical thinking brain teasers! These puzzles and games aren’t just a great way to spend your free time; they can also enhance your cognitive skills and contribute to personal growth and success. Whether you’re looking to improve your problem-solving abilities, boost your creativity, or simply challenge your mind, critical thinking brain teasers are the perfect way to do it.

Throughout this article, we’ll explore what critical thinking brain teasers are, the benefits of solving them, and how to approach them effectively. You’ll also discover different types of brain teasers, popular logic puzzles, and mind-bending teasers designed specifically for adults.

Table of Contents

Key Takeaways:

  • Critical thinking brain teasers can enhance cognitive skills and contribute to personal growth and success.
  • They require logical reasoning and problem-solving skills to solve.
  • Solving critical thinking brain teasers can improve cognitive abilities such as logical reasoning, analytical thinking, and creativity.
  • Logic puzzles are a specific type of critical thinking brain teasers that require logical deductions and reasoning to solve.

What are Critical Thinking Brain Teasers?

Critical thinking brain teasers are puzzles or challenges that require you to use logical reasoning and problem-solving skills to solve. They are designed to stimulate the mind and challenge your cognitive abilities. These brain teasers come in various forms, from riddles and logical puzzles to math problems and trivia questions.

The purpose of critical thinking brain teasers is to improve your cognitive skills, such as analytical thinking, creativity, and logical reasoning. By engaging in these brain teasers, you can develop and enhance your cognitive abilities and contribute to personal growth and success in various areas of life.

Examples of different types of critical thinking brain teasers include lateral thinking puzzles, Sudoku, and crossword puzzles. Lateral thinking puzzles require you to think outside the box and consider all possible solutions to a problem. Sudoku and crossword puzzles involve logical deduction and problem-solving skills to complete.

Benefits of Solving Critical Thinking Brain Teasers

Engaging in critical thinking brain teasers can have numerous benefits for your cognitive abilities and personal growth. By challenging your mind with difficult riddles and puzzles, you can enhance your logical reasoning, analytical thinking, and creativity skills. Here are some of the most significant benefits:

  • Improved problem-solving skills: Critical thinking brain teasers require you to analyze complex problems and come up with creative solutions. This skill can be applied in various real-life scenarios, from work to personal life.
  • Increased self-confidence: As you solve more challenging brain teasers, you build a sense of accomplishment and satisfaction, which can lead to improved self-esteem and self-confidence.
  • Reduced stress: Engaging in brain teasers can be a fun and relaxing activity that takes your mind off everyday stress. It can also improve your mental resilience and ability to handle stress more effectively.
  • Enhanced creativity: Brain teasers can help you think outside of the box, leading to enhanced creativity and innovation.
  • Improved memory: Solving brain teasers requires you to retain information, which can contribute to improved memory retention and recall.

How to Approach Critical Thinking Brain Teasers

Critical thinking brain teasers can be challenging, but with the right approach, you can improve your problem-solving skills and boost your confidence. Here are a few tips on how to approach critical thinking brain teasers effectively:

Analyze the Problem

The first step to approaching a critical thinking brain teaser is to analyze the problem. Take the time to read the problem carefully and identify any key details or information that may be relevant.

Break it Down

Once you’ve analyzed the problem, break it down into smaller parts. This will help you to better understand the problem and identify possible solutions.

Consider Different Perspectives

When approaching a critical thinking brain teaser, consider different perspectives. Think about the problem from different angles and try to come up with multiple solutions. This will help you to develop your problem-solving skills and think more creatively.

By following these tips and strategies, you can approach critical thinking brain teasers with confidence and improve your problem-solving skills.

Logic Puzzles: A Type of Critical Thinking Brain Teasers

Logic puzzles are a specific type of critical thinking brain teasers that require you to use logical deductions and reasoning to solve. They involve a sequence of statements or clues that you must use to deduce the correct answer. Logic puzzles are an excellent way to improve your critical thinking and problem-solving skills.

One popular type of logic puzzle is the Sudoku puzzle. This puzzle involves a 9×9 grid that you must fill with numbers so that each row, column, and 3×3 sub-grid contains the numbers 1 to 9. Another type of logic puzzle is the grid puzzle, which requires you to use logic to fill in a grid based on certain rules.

Other examples of logic puzzles include the Einstein puzzle, the Tower of Hanoi puzzle, and the Knight and Knave puzzle. These brain teasers are not only fun to solve but also help improve your critical thinking abilities.

Mind-bending Brain Teasers for Adults

If you’re looking for challenging brain teasers that will push your critical thinking skills to the limit, then mind-bending brain teasers are just what you need. These brain teasers are specifically designed for adults and will provide hours of mental stimulation and entertainment.

One popular type of mind-bending brain teaser is the lateral thinking puzzle, which requires you to think outside the box to find the solution. These puzzles often involve unconventional scenarios and require you to use your creativity and imagination to come up with the answer.

Another type of mind-bending brain teaser is the math puzzle, which requires you to use your analytical skills to solve complex equations and problems. These puzzles are great for improving your logical reasoning and problem-solving abilities.

If you’re looking for something a little different, there are also word puzzles and visual puzzles that will challenge your cognitive abilities. These puzzles require you to use your language skills and spatial reasoning, respectively, to solve the problem.

Overall, mind-bending brain teasers are a great way to push your brain to its limits and improve your critical thinking skills. Whether you’re looking for a fun way to pass the time or want to improve your cognitive abilities, these brain teasers are sure to provide a mental workout that will leave you feeling satisfied and accomplished.

The Role of Critical Thinking Games

If you enjoy interactive and engaging ways to develop critical thinking, then critical thinking games are a perfect fit for you. These games are designed to challenge your problem-solving abilities and stimulate your critical thinking skills. By playing these games, you not only enhance your cognitive skills but also have fun doing it.

Critical thinking games offer a variety of challenges, from puzzles to riddles to strategic games. They are available in various formats, including board games, online games, and mobile apps. You can choose the format that works best for you and your lifestyle.

One of the benefits of critical thinking games is that they provide an entertaining way to sharpen your critical thinking skills. You can enjoy playing games while also improving your thinking abilities. These games also offer opportunities to learn new problem-solving techniques and strategies.

There are many popular critical thinking games available, including Settlers of Catan, Clue, and Chess. Each game has its unique challenges that require you to think critically and solve problems. You can also find many online resources that offer free access to critical thinking games.

Whether you prefer to play games alone or with others, there are countless options available for you to develop your critical thinking skills. So why not give critical thinking games a try and see how they can benefit you?

How to Incorporate Critical Thinking Brain Teasers into Daily Routine

If you want to improve your critical thinking skills, incorporating brain teasers into your daily routine is a great idea. Here are some practical tips to get you started:

  • Dedicate a specific time for brain teasers: Set aside some time every day to work on brain teasers. This could be in the morning, during your lunch break, or before bedtime. The important thing is to make it a regular habit.
  • Use mobile apps or online resources: There are many mobile apps and websites that offer a wide variety of brain teasers for different skill levels. Check out some of these resources and find ones that work for you.
  • Engage in group brain teaser challenges: Working on brain teasers with other people can be a fun and stimulating way to improve your skills. Organize a brain teaser challenge with friends, family, or coworkers.

By incorporating critical thinking brain teasers into your daily routine, you’ll be able to improve your problem-solving abilities and develop your critical thinking skills over time.

Recommended Resources for Critical Thinking Brain Teasers

If you’re looking for a variety of critical thinking brain teasers to challenge and improve your cognitive abilities, there are plenty of resources available. Here are some recommended sources for finding brain teasers that suit your skill level:

Explore these resources to find critical thinking brain teasers that suit your skill level and personal interests. Remember, the more you practice solving brain teasers, the better you will become at critical thinking and problem-solving!

Case Studies: Real-life Examples of Critical Thinking Brain Teasers

John was struggling to make a decision about which job offer to accept. He turned to critical thinking brain teasers to help him analyze the pros and cons of each opportunity. By breaking down the decision-making process into smaller parts, he was able to identify the key factors that were most important to him. As a result, he confidently accepted the job offer that aligned with his values and career goals.

Samantha was feeling stuck in her creative writing. She turned to critical thinking riddles and puzzles to stimulate her imagination and overcome writer’s block. By engaging in lateral thinking and exploring different perspectives, she was able to generate new ideas and break through her creative wall. Her newfound creativity not only improved her writing but also spilled over into other areas of her life.

Can Critical Thinking Brain Teasers Improve Emotional Intelligence?

Can critical thinking brain teasers really improve emotional intelligence turbocharge your brainpower ? The answer is a resounding yes. By engaging in puzzles and problem-solving activities, individuals can enhance their cognitive abilities, such as comprehension and analytical thinking. This, in turn, can positively impact emotional intelligence, enabling individuals to better understand and manage their own emotions as well as empathize with others. So, if you’re looking to boost your brainpower, don’t overlook the power of critical thinking brain teasers to improve your emotional intelligence.

Now that you’ve learned about the benefits of critical thinking brain teasers, it’s time to put that knowledge into action. By incorporating brain teasers into your daily routine, you can improve your cognitive abilities and enhance your problem-solving skills. Remember to approach brain teasers with a logical and analytical mindset, breaking down problems into smaller parts and considering different perspectives.

Don’t be afraid to challenge yourself with mind-bending brain teasers for adults or explore the world of logic puzzles. And if you need help finding brain teasers, there are plenty of resources available online, including critical thinking games and websites with a vast array of puzzles for any skill level.

By making critical thinking brain teasers a regular part of your routine, you can contribute to your personal growth and success, boost your confidence and self-esteem, and become a master problem solver. So, what are you waiting for? Start sharpening those critical thinking skills today!

A: Critical thinking brain teasers are puzzles or challenges that require logical reasoning and problem-solving skills to solve. They are designed to stimulate critical thinking and enhance cognitive abilities.

A: Solving critical thinking brain teasers can improve cognitive abilities such as logical reasoning, analytical thinking, and creativity. They can also boost confidence and self-esteem.

A: To approach critical thinking brain teasers effectively, it is important to analyze the problem, break it down into smaller parts, and consider different perspectives. Developing problem-solving skills is also helpful.

A: Logic puzzles are a specific type of critical thinking brain teasers that require logical deductions and reasoning to solve. They often involve finding patterns or making connections between different pieces of information.

A: Yes, there are mind-bending brain teasers specifically designed for adults. These brain teasers challenge the mind and stimulate critical thinking.

A: You can incorporate critical thinking brain teasers into your daily routine by dedicating a specific time for solving them, using mobile apps or online resources, and engaging in group brain teaser challenges.

A: There are various websites, books, and apps that offer a wide variety of critical thinking brain teasers for different skill levels. Some of these resources may be free, while others may require a fee.

A: Yes, there are many real-life examples of how critical thinking brain teasers have positively impacted individuals’ problem-solving abilities and critical thinking skills. These examples showcase the practical application of critical thinking in various situations.

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20 Tough Riddles for Adults That Will Have You Scratching Your Head

Put your logic and math skills to the test. No cheating!

Image no longer available

So go grab a pencil and a piece of scratch paper and prepare to rip your hair out (and we really do mean that in the best way possible). When you think you’ve got the right answer, click the link at the bottom of each riddle to find the solution. Got it wrong? No worries, you have 19 other riddles to test out.

Navigate Through Our Riddles:

Puzzmo / The King’s Orders / How Many Eggs? / The Gold Chain / Pickleball / Circuit Breaker / Two Trains, Two Grandmas / Ant Math / Peppermint Patty / Great American Rail Trail / A Cruel SAT Problem / Movie Stars Cross a River / Tribute to a Math Genius / One Belt, One Earth / Elbow Tapping / Whiskey Problem / Doodle Problem / Stumping Scientists / What ’ s On Her Forehead? / Keanu for President / Who Opened the Lockers?

decorative hr

Riddle No. 1: The King’s Orders Make for One Hell of a Brain Teaser

Difficulty: easy.

King Nupe of the kingdom Catan dotes on his two daughters so much that he decides the kingdom would be better off with more girls than boys, and he makes the following decree: All child-bearing couples must continue to bear children until they have a daughter!

But to avoid overpopulation, he makes an additional decree: All child-bearing couples will stop having children once they have a daughter! His subjects immediately begin following his orders.

After many years, what’s the expected ratio of girls to boys in Catan?

The likelihood of each baby born being a girl is, of course, 50 percent.

Ready for the solution? Click here to see if you’re right .

preview for Can You Build The Farmer's Fence? | SOLVE IT

Riddle No. 2: How Many Eggs Does This Hen Lay?

This problem is in honor of my dad, Harold Feiveson. It’s due to him that I love math puzzles, and this is one of the first problems (of many) that he gave me when I was growing up.

A hen and a half lays an egg and a half in a day and a half. How many eggs does one hen lay in one day?

Riddle No. 3: The Gold Chain Math Problem Is Deceptively Simple

Difficulty: moderate.

You’re rummaging around your great grandmother’s attic when you find five short chains each made of four gold links. It occurs to you that if you combined them all into one big loop of 20 links, you’d have an incredible necklace. So you bring it into a jeweler, who tells you the cost of making the necklace will be $10 for each gold link that she has to break and then reseal.

How much will it cost?

Riddle No. 4: Try to Solve This Pickleball Puzzle

Difficulty: 🚨hard🚨.

Kenny, Abby, and Ned got together for a round-robin pickleball tournament, where, as usual, the winner stays on after each game to play the person who sat out that game. At the end of their pickleball afternoon, Abby is exhausted, having played the last seven straight games. Kenny, who is less winded, tallies up the games played:

Kenny played eight games

Abby played 12 games

Ned played 14 games

Who won the fourth game against whom?

How many total games were played?

Riddle No. 5: Our Circuit Breaker Riddle Is Pure Evil. Sorry.

The circuit breaker box in your new house is in an inconvenient corner of your basement. To your chagrin, you discover none of the 100 circuit breakers is labeled, and you face the daunting prospect of matching each circuit breaker to its respective light. (Suppose each circuit breaker maps to only one light.)

To start with, you switch all 100 lights in the house to “on,” and then you head down to your basement to begin the onerous mapping process. On every trip to your basement, you can switch any number of circuit breakers on or off. You can then roam the hallways of your house to discover which lights are on and which are off.

What is the minimum number of trips you need to make to the basement to map every circuit breaker to every light?

The solution does not involve either switching on or off the light switches in your house or feeling how hot the lightbulbs are. You might want to try solving for the case of 10 unlabeled circuit breakers first.

Riddle No. 6: Two Trains. Two Grandmas. Can You Solve This Tricky Math Riddle?

Jesse’s two grandmothers want to see him every weekend, but they live on opposite sides of town. As a compromise, he tells them that every Sunday, he’ll head to the subway station nearest to his apartment at a random time of the day and will hop on the next train that arrives.

If it happens to be the train traveling north, he’ll visit his Grandma Erica uptown, and if it happens to be the train traveling south, he’ll visit his Grandma Cara downtown. Both of his grandmothers are okay with this plan, since they know both the northbound and southbound trains run every 20 minutes.

But after a few months of doing this, Grandma Cara complains that she sees him only one out of five Sundays. Jesse promises he’s indeed heading to the station at a random time each day. How can this be?

The trains always arrive at their scheduled times.

Riddle No. 7: Here’s a Really F@*#ing Hard Math Problem About Ants

Max and Rose are ant siblings. They love to race each other, but always tie, since they actually crawl at the exact same speed. So they decide to create a race where one of them (hopefully) will win.

For this race, each of them will start at the bottom corner of a cuboid, and then crawl as fast as they can to reach a crumb at the opposite corner. The measurements of their cuboids are as pictured:

ant riddle

If they both take the shortest possible route to reach their crumb, who will reach their crumb first? (Don’t forget they’re ants, so of course they can climb anywhere on the edges or surface of the cuboid.)

Remember: Think outside the box.

Riddle No. 8: This Peppermint Patty Riddle Is Practically Impossible

You’re facing your friend, Caryn, in a “candy-off,” which works as follows: There’s a pile of 100 caramels and one peppermint patty. You and Caryn will go back and forth taking at least one and no more than five caramels from the candy pile in each turn. The person who removes the last caramel will also get the peppermint patty. And you love peppermint patties.

Suppose Caryn lets you decide who goes first. Who should you choose in order to make sure you win the peppermint patty?

First, solve for a pile of 10 caramels.

Riddle No. 9: Can You Solve the Great American Rail-Trail Riddle?

This problem was suggested by the physicist P. Jeffrey Ungar.

Finally, the Great American Rail-Trail across the whole country is complete! Go ahead, pat yourself on the back—you’ve just installed the longest handrail in the history of the world, with 4,000 miles from beginning to end. But just after the opening ceremony, your assistant reminds you that the metal you used for the handrail expands slightly in summer, so that its length will increase by one inch in total.

“Ha!” you say, “One inch in a 4,000 mile handrail? That’s nothing!” But … are you right?

Let’s suppose when the handrail expands, it buckles upward at its weakest point, which is in the center. How much higher will pedestrians in the middle of the country have to reach in summer to grab the handrail? That is, in the figure below, what is h ? (For the purposes of this question, ignore the curvature of the Earth and assume the trail is a straight line.)

great american rail trail riddle

Pythagoras is a fascinating historical figure.

Riddle No. 10: This Riddle Is Like an Especially Cruel SAT Problem. Can You Find the Answer?

Amanda lives with her teenage son, Matt, in the countryside—a car ride away from Matt’s school. Every afternoon, Amanda leaves the house at the same time, drives to the school at a constant speed, picks Matt up exactly when his chess club ends at 5 p.m., and then they immediately return home together at the same constant speed. But one day, Matt isn’t feeling well, so he leaves chess practice early and starts to head home on his portable scooter.

After Matt has been scooting for an hour, Amanda comes across him in her car (on her usual route to pick him up), and they return together, arriving home 40 minutes earlier than they usually do. How much chess practice did Matt miss?

Consider the case where Amanda meets Matt exactly as she’s leaving their house.

Riddle No. 11: Can You Get These 3 Movie Stars Across the River?

Three movie stars, Chloe, Lexa, and Jon, are filming a movie in the Amazon. They’re very famous and very high-maintenance, so their agents are always with them. One day, after filming a scene deep in the rainforest, the three actors and their agents decide to head back to home base by foot. Suddenly, they come to a large river.

On the riverbank, they find a small rowboat, but it’s only big enough to hold two of them at one time. The catch? None of the agents are comfortable leaving their movie star with any other agents if they’re not there as well. They don’t trust that the other agents won’t try to poach their star.

For example, Chloe’s agent is okay if Chloe and Lexa are alone in the boat or on one of the riverbanks, but definitely not okay if Lexa’s agent is also with them. So how can they all get across the river?

There isn’t just one way to solve this problem.

Riddle No. 12: This Ludicrously Hard Riddle Is Our Tribute to a Late Math Genius. Can You Figure It Out?

On April 11, John Horton Conway , a brilliant mathematician who had an intense and playful love of puzzles and games, died of complications from COVID-19. Conway is the inventor of one of my favorite legendary problems (not for the faint of heart) and, famously, the Game of Life . I created this problem in his honor.

Carol was creating a family tree, but had trouble tracking down her mother’s birthdate. The only clue she found was a letter written from her grandfather to her grandmother on the day her mother was born. Unfortunately, some of the characters were smudged out, represented here with a “___” . (The length of the line does not reflect the number of smudged characters.)

“Dear Virginia,

Little did I know when I headed to work this Monday morning, that by evening we would have a beautiful baby girl. And on our wedding anniversary, no less! It makes me think back to that incredible weekend day, J___ 27th, 19___ , when we first shared our vow to create a family together, and, well, here we are! Happy eighth anniversary, my love.

Love, Edwin”

The question: When was Carol’s mother born?

This problem is inspired by Conway’s Doomsday Rule .

Riddle No. 13: To Solve This Twisty Math Riddle, You Just Need One Belt and One Earth

Imagine you have a very long belt. Well, extremely long, really … in fact, it’s just long enough that it can wrap snugly around the circumference of our entire planet. (For the sake of simplicity, let’s suppose Earth is perfectly round, with no mountains, oceans, or other barriers in the way of the belt.)

Naturally, you’re very proud of your belt. But then your brother, Peter, shows up—and to your disgruntlement, he produces a belt that’s just a bit longer than yours. He brags his belt is longer by exactly his height: 6 feet.

If Peter were also to wrap his belt around the circumference of Earth, how far above the surface could he suspend the belt if he pulled it tautly and uniformly?

Earth’s circumference is about 25,000 miles, or 130 million feet … but you don’t need to know that to solve this problem.

Riddle No. 14: This Elbow Tapping Riddle Is Diabolical. Good Luck Solving It.

In some future time, when the shelter-in-place bans are lifted, a married couple, Florian and Julia, head over to a bar to celebrate their newfound freedom.

They find four other couples there who had the same idea.

Eager for social contact, every person in the five couples enthusiastically taps elbows (the new handshake) with each person they haven’t yet met .

It actually turns out many of the people had known each other prior, so when Julia asks everyone how many elbows they each tapped, she remarkably gets nine different answers!

The question: How many elbows did Florian tap?

What nine answers did Julia hear?

Riddle No. 15: You’ll Need a Drink After Trying to Solve This Whisky Riddle

Alan and Claire live by the old Scottish saying, “Never have whisky without water, nor water without whisky!” So one day, when Alan has in front of him a glass of whisky, and Claire has in front of her a same-sized glass of water, Alan takes a spoonful of his whisky and puts it in Claire’s water. Claire stirs her whisky-tinted water, and then puts a spoonful of this mixture back into Alan’s whisky to make sure they have exactly the same amount to drink.

So: Is there more water in Alan’s whisky, or more whisky in Claire’s water? And does it matter how well Claire stirred?

The size of the spoon does not matter.

Riddle No. 16: The Doodle Problem Is a Lot Harder Than It Looks. Can You Solve It?

This week’s riddle is relatively simple—but sinister all the same.

The question: Can you make 100 by interspersing any number of pluses and minuses within the string of digits 9 8 7 6 5 4 3 2 1? You can’t change the order of the digits! So what’s the least number of pluses and minuses needed to make 100?

Text, Font, Logo, Graphics, Smile,

For instance, 98 - 7 - 6 + 54 - 32 shows one way of interspersing pluses and minuses, but since it equals 107, it’s not a solution.

I call this a “doodle problem”: one that’s best worked on during meetings where you might be doodling otherwise.

You might want to start looking for solutions that use a total of seven pluses and minuses (although there are ways to use fewer).

Ready for the solution? Click here to see if you’re right.

Riddle No. 17: This Math Puzzle Stumped Every Scientist but One. Think You Can Crack It?

Difficulty: hard.

In honor of Freeman Dyson, the renowned physicist who died last month , here’s a legendary tale demonstrating his quick wit and incredible brain power.

One day, in a gathering of top scientists, one of them wondered out loud whether there exists an integer that you could exactly double by moving its last digit to its front. For instance, 265 would satisfy this if 526 were its exact double—which it isn’t.

After apparently just five seconds , Dyson responded, “Of course there is, but the smallest such number has 18 digits.”

This left some of the smartest scientists in the world puzzling over how he could have figured this out so quickly.

So given Dyson’s hint, what is the smallest such number?

My second grader has recently learned how to add a 3-digit number to itself using the classic vertical method:

Font, Text, Calligraphy, Line, Art, Writing,

18-digit numbers, of course, can be added in the same way.

Riddle No. 18: Figure Out What’s on Her Forehead

Cecilia loves testing the logic of her very logical friends Jaya, Julian, and Levi, so she announces:

“I’ll write a positive number on each of your foreheads. None of the numbers are the same, and two of the numbers add up to the third.”

She scribbles the numbers on their heads, then turns to Jaya and asks her what her number is. Jaya sees Julian has 20 on his forehead, and Levi has 30 on his. She thinks for a moment and then says, “I don’t know what my number is.” Julian pipes in, “I also don’t know my number,” and then Levi exclaims, “Me neither!” Cecilia gleefully says, “I’ve finally stumped you guys!”

“Not so fast!” Jaya says. “Now I know my number!”

What is Jaya’s number?

Jaya could be one of two numbers, but only one of those numbers would lead to Julian and Levi both not knowing their numbers. Why?

Riddle No. 19: Can You Get Keanu Reeves Elected As President?

It’s 2024, and there are five candidates running in the democratic primary: Taylor Swift, Oprah Winfrey, Mark Cuban, Keanu Reeves, and Dwayne Johnson. (Hey, it could happen.) As usual, the first primary is in Iowa.

In an effort to overcome its embarrassment after the 2020 caucus debacle , the Iowa Democratic Party has just announced a new, foolproof way of finding the best candidate: there will be four consecutive elections.

First, candidate 1 will run against candidate 2. Next, the winner of that will run against candidate 3, then that winner will run against candidate 4, and finally the winner of that election will run against the final candidate. By the transitive property, the winner of this last election must be the best candidate ... so says the Iowa Democratic Party.

Candidate Keanu has been feeling pretty low, as he knows he is ranked near the bottom by most voters, and at the top by none. In fact, he knows the Iowa population is divided into five equal groups, and that their preferences are as follows:

Text, Font, Line, Organism, Document, Number, Handwriting, Calligraphy, Smile, Art,

Keanu is childhood friends with Bill S. Preston, Esq., the new head of the Iowa Democratic Party. Preston, confident that the order of the candidates doesn’t matter for the outcome, tells Keanu he can choose the voting order of the candidates.

So what order should Keanu choose?

How would Keanu fare in one-to-one races against each candidate?

Riddle No. 20: Who Opened All These Damn Lockers?

There are 100 lockers that line the main hallway of Chelm High School. Every night, the school principal makes sure all the lockers are closed so that there will be an orderly start to the next day. One day, 100 mischievous students decide that they will play a prank.

The students all meet before school starts and line up. The first student then walks down the hallway, and opens every locker. The next student follows by closing every other locker (starting at the second locker). Student 3 then goes to every third locker (starting with the third) and opens it if it’s closed, and closes it if it’s open. Student 4 follows by opening every fourth locker if it’s closed and closing it if it’s open. This goes on and on until Student 100 finally goes to the hundredth locker. When the principal arrives later in the morning, which lockers does she find open?

Make sure you pay attention to all of the factors.

Headshot of Laura Feiveson

Laura Feiveson is an economist for the government, a storyteller, and a lifelong enthusiast of math puzzles.  She lives in Washington, DC with her husband and two daughters. 

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Critical thinking puzzles for adults (with answers)

critical thinking puzzles

Critical thinking can help to better navigate the information-dense and complex world we live in. By thinking critically we can better identify priorities, take a sensible approach to problem-solving and reach conclusions logically in line with evidence. Puzzles are an excellent way both to learn and practice critical thinking skills.

If you’d like to learn more about critical thinking or simply practice your skills with some puzzles, then this is the article for you. Read a little bit more about critical thinking skills and how to apply them first, or just skip straight to the puzzles and see how you get on.

What is critical thinking?

Critical thinking is a broad approach to problem solving and analysis based on logic and evidence. It brings together a wide range of intellectual competences and the ability to combine and cross-reference them. Some of the most important elements of a critical thinking approach include:

Analytical skills:

  • understanding of questions and concepts
  • differentiation of relevant / irrelevant evidence and information
  • identification of similarities, connections and differences
  • use of metaphors or analogies to communicate ideas

Powers of inference:

  • extraction of meaning from data using inductive or deductive reasoning
  • extrapolation of data or abstraction into concepts and patterns
  • correct identification and deployment of analogies and assumptions
  • grasp of causal relationships, allowing development of conclusions and theories.

Data and theory evaluation:

  • assessment of how strong, important or credible a theory might be
  • taking on board new data and new arguments which alter understanding of ideas and theory

Rational decision-making:

– application of all the skills and competences above in order to come to a rational conclusion.

Problem-solving attitude: In addition to being able to think critically, you must also be personally inclined to think critically when facing a difficult or complex challenge. Developing qualities including curiosity and fairness, while distancing yourself from ideologies and group-think, should all help to create the kind of psychological landscape where critical thinking can flourish.

How can I learn critical thinking?

Critical thinking skills are hard to develop from only reading books or listening to lectures. The most effective way to sharpen and deepen critical thinking faculties is to practice critical thinking . Critical thinking puzzles offer a fun way to learn and the eight critical thinking puzzles we’ve chosen for this article should help you make a good start.

critical thinking brain teasers

The aMAZEing PuzzleBox

Level 7 sequential discovery puzzle box​

Made from original LEGO® bricks​

Find the  GOLDEN BAR  to complete the challenge


Eight critical thinking puzzles – with answers

Puzzle 1 – letter puzzles.

What common feature do the following words share?

Answer: All of these words begin with a vowel. This type of puzzle may send your mind off in the wrong direction, thinking about the objects or concepts described by the words, and the properties they might share. In fact, the solution lies in a far more simple consideration of the alphabet. Puzzle 1 is a simple example of a common type of letter or word puzzle.

Puzzle 2 – Commonalities and differences

What do the following items have in common and which is the odd one out?

Orange Juice

Answer: These items are all liquids and the odd one out is petrol, since all the others are drinkable liquids.

Puzzle 3 – Falling on his feet

A man who lives in a high-rise building decides to exit through the window one morning rather than using the door. Somehow he survives the fall without a scratch and walks away to work. How did this happen?

Answer: The man lived on the ground or first floor and merely stepped or jumped down to the pavement outside. By stating early on that the building in question was a high-rise building, it’s easy for someone reading quickly to assume that the man jumped from a window on a high store but this it s not necessarily the case.

Puzzle 4 – Walk this way

A group of five people enter a windowless meeting room together. An hour later when the meeting ends, four walk out of the door, leaving the room empty. What has happened to the fifth member of the group?

Answer: The fifth person was in a wheelchair and wheeled out of the room rather than walked. Solving this puzzle requires you to think laterally about the question and the possible solutions. The answer can be found by asking yourself whether the emphasis of the question is on the emptiness of the room or the means by which the other four people left.

Puzzle 5 – Shapes and symbols

When lying on my side, I am everything, but when cut in half, I am nothing. What am I?

Answer: The number 8. This puzzle requires that you think about a shape being repositioned or cut in a way that can change it to “everything” or “nothing”. Number 8 on its side is the mathematical symbol for infinity (i.e. everything) and also shaped like two small number 0s put together.

Puzzle 6 – Three hard options

The hero is escaping the lair of an evil super-villain and is faced with three possible exits:

  • Door A leads into a pit of bubbling lava
  • Door B leads to a room housing a deadly hitman
  • Door C leads to the den full of lions that haven’t had a meal for a year.

Which door should the hero choose?

Answer: Door C. If the lion hasn’t eaten in a year, it will definitely be dead by now. This type of puzzle requires you to consider the full implications of the information given, rather than being drawn into a comparison of the relative dangers of lava, hitmen and lions…

Puzzle 7 – The bus driver’s eyes

You are a bus driver. Today the bus is empty at the start of your route but at the first stop, four people get onto the bus. Eight people get on at the second stop, while three alight. When the bus reaches the third stop, one more gets off, and three get on.

At the fourth stop, two people get off the bus and one gets on. The bus is traveling at an average speed of 30mph and its tires are new.  What color are the bus driver’s eyes?

Answer: You are the bus driver so the color will be the color of your own eyes. This type of puzzle tries to confuse you and obscure the single piece of relevant information by presenting large quantities of irrelevant information.

Puzzle 8 – Losing weight

A man walks into a room, closes the doors behind him and presses a button. In a matter of seconds the man is 20lb lighter. Despite this, he leaves the room at the same weight he entered it.

Answer: The room in question is actually an elevator. When the man gets in and presses the button, the elevator moves downwards with an acceleration that reduces the effect of gravity and makes the man temporarily 20lb lighter. Once the lift stops moving, the man’s weight is subject to normal gravity, just the same as before. Solving this puzzle requires a small piece of general physics knowledge.

A final word…

We hope you’ve enjoyed our critical thinking puzzles for adults and that your critical thinking skills are feeling refreshed and sharpened after reading our article. Whether at school, in the workplace, or in general life, critical thinking can be a valuable tool for success and anyone can learn to use it.

Get more critical thinking puzzles on our Youtube channel:

20 Challenging Lateral Thinking Puzzles That Are Harder Than They Seem

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85 Tricky Riddles for Adults That Will Really Test Your Knowledge

These brain-teasers range from super easy to downright mind-boggling.

preview for The Best Dad Jokes Of All Time

We've got plenty of clever, hard and downright mind-boggling brain-teasers for you to solve. But if you're looking for something a little easier, we also got a ton of kid-friendly riddles you can figure with your children. There are also plenty of math riddles , too, which will come in handy as icebreakers during work meetings, in the classroom or at a party.

And don't think we just left you hanging with these questions. All of the answers to the mysteries are included.

Be sure to let us know which was your favorite in the comments below!

what has a neck but no head a bottle

Easy Riddles

Q: What 5-letter word typed in all capital letters can be read the same upside down?

Q: The more you take, the more you leave behind. What am I?

A: Footsteps.

Q:David's father has three sons: Snap, Crackle, and _____?

Q: What is more useful when it is broken?

Q: I am easy to lift, but hard to throw. What am I?

A: A feather.

Q: Where do you take a sick boat?

A: To the dock-tor.

Q: Which fish costs the most?

A: A goldfish.

Q: What goes up, but never comes down?

Q: A cowboy rode into town on Friday. He stayed for three nights and rode out on Friday. How is this possible?

A: His horse's name is Friday.

Q: What has a neck but no head?

A: A bottle

Q: What is full of holes but still holds water?

A: A sponge

Q: How do you spell COW in thirteen letters?


Q: Why is Europe like a frying pan?

A: Because it has Greece at the bottom.

Math Riddles

i am an odd number take away a letter and i become even what number am i seven

Q: If 2 is company and 3 is a crowd, what are 4 and 5?

Q: I add 5 to 9 and get 2. The answer is correct, so what am I?

A: A clock. When it is 9 a.m., adding 5 hours would make it 2 p.m.

Q: Rachel goes to the supermarket and buys 10 tomatoes. Unfortunately, on the way back home, all but 9 get ruined. How many tomatoes are left in a good condition?

Q: What is 3/7 chicken, 2/3 cat, and 2/4 goat?

A: Chicago!

Q: If a zookeeper had 100 pairs of animals in her zoo, and two pairs of babies are born for each one of the original animals, then (sadly) 23 animals don’t survive, how many animals do you have left in total?

A: 977 animals (100 x 2 = 200; 200 + 800 = 1000; 1000 – 23 = 977)

Q: I saw my math teacher with a piece of graph paper yesterday.

A: I think he must be plotting something.

Q: If you multiply this number by any other number, the answer will always be the same. What number is this?

Q: I am an odd number. Take away a letter and I become even. What number am I?

Q: What 3 numbers give the same result when multiplied and added together?

A: 1, 2, and 3 (1 + 2 + 3 = 6 and 1 x 2 x 3 = 6).

Q: What's a single-digit number with no value?

Q: A tree doubled in height each year until it reached its maximum height over the course of ten years. How many years did it take for the tree to reach half its maximum height?

A: Nine years.

Funny Riddles

Q: How can you drop a raw egg from a height onto a concrete floor without cracking it?

A: Concrete floors are very hard to crack.

Q: Pronounced as 1 letter, And written with 3, 2 letters there are, and 2 only in me. I’m double, I’m single, I’m black blue, and gray, I’m read from both ends, and the same either way. What am I?

Q: Who has married many women but was never married?

A: The priest

Q: Forward, I am heavy; backward, I am not. What am I?

Q: What can you hold in your right hand, but never in your left hand?

A: Your left hand.

Q: If two snakes marry, what will their towels say?

A: Hiss and hers

Q: What does a man do only once in his lifetime, but women do once a year after they are 29?

Hard Riddles

what has hands but cannot clap a clock

Q: Four cars come to a four-way stop, each coming from a different direction. They can’t decide who got there first, so they all go forward at the same time. All 4 cars go, but none crash into each other. How is this possible?

A: They all made right-hand turns.

Q: I have a head like a cat and feet like a cat, but I am not a cat. What am I?

A: A kitten.

Q: Who makes it, has no need of it. Who buys it, has no use for it. Who uses it can neither see nor feel it. What is it?

A: A coffin.

Q: What has hands but cannot clap?

A: A clock.

Q: Paul's height is six feet, he's an assistant at a butcher's shop, and wears size 9 shoes. What does he weigh?

Q: What gets broken without being held?

A: A promise.

Q: Poor people have it. Rich people need it. If you eat it you die. What is it?

A: Nothing.

Q: What is the longest word in the dictionary?

A: Smiles, because there is a mile between each ‘s’.

Q: Throw away the outside and cook the inside, then eat the outside and throw away the inside. What is it?

A: Corn on the cob.

Q: What is at the end of a rainbow?

A: The letter W!

Q: What kind of tree can you carry in your hand?

Q: They come out at night without being called, and are lost in the day without being stolen. What are they?

Q: What is always in front of you, but can’t be seen?

A: The future.

Q: You’ll find me in Mercury, Earth, Mars, Jupiter, Saturn, and Uranus. But never Neptune, or Venus. What am I?

A: The letter “R”.

Q: How many months have 28 days?

A: Every month has 28 days.

Q: I can be cracked, made, told, and played. What am I?

Q: I cannot talk, but I always reply when spoken to. What am I?

A: An echo.

Q: When is the top of a mountain similar to a savings account?

A: When it peaks one’s interest.

Q: A man goes out for a walk during a storm with nothing to protect him from the rain. He doesn’t have a hat, a hood, or an umbrella. But by the end of his walk, there isn’t a single wet hair on his head. Why doesn’t the man have wet hair?

A: He’s bald.

Q: I love to dance, and twist. I shake my tail as I sail away. When I fly wingless into the sky. What am I?

Q: When you stop to look, you can always see me. But if you try to touch me, you can never feel me. Although you walk towards me, I remain the same distance from you. What am I?

A: The horizon

Q: You see a boat filled with people. It has not sunk. But when you look back, you don’t see a single person on the boat. Why?

A: All the people on board are married.

Q: What is it that no one wants to have, but no one wants to lose either?

A: A lawsuit.

Q: I welcome the day with a show of light, I stealthily came here in the night.I bathe the earthy stuff at dawn, But by noon, alas! I'm gone.

A: The morning dew.

Q: What goes through cities and fields, but never moves?

Q: What can be touched but can't be seen?

A: Someone’s heart.

Q: In a bus, there is a 26-year-old pregnant lady, a 30-year-old policeman, a 52-year-old random woman, and the driver who is 65 years old. Who is the youngest?

A: The baby of the pregnant lady.

Q: When it is alive we sing, when it is dead we clap our hands. What is it?

A: A birthday candle.

Q: What can go through glass without breaking it?

Q: What gets bigger the more you take away?

Q: I have no life, but I can die. What am I?

A: A battery.

Q: What kind of room has no walls, door or windows?

A: A mushroom.

Q: It belongs to you, but your friends use it more. What is it?

A: Your name.

Q: What 2 things can you never eat for breakfast?

A: Lunch and dinner.

Q: I make a loud sound when I’m changing. When I do change, I get bigger but weigh less. What am I?

A: Popcorn.

Q: It has keys, but no locks. It has space, but no room. You can enter, but can’t go inside. What is it?

A: A keyboard.

Q: I’m orange, I wear a green hat and I sound like a parrot. What am I?

A: A carrot.

Q: What runs all around a backyard, yet never moves?

A: A fence.

Q: Take off my skin - I won't cry, but you will! What am I?

A: An onion.

Q: What invention lets you look right through a wall?

A: A window.

Q: What is always on its way but never arrives?

A: Tomorrow.

Q: Two girls were born to the same mother, on the same day, at the same time, in the same month and year, and yet they're not twins. How can this be?

A: The two babies are two of a set of triplets.

Q: What has a bottom at the top?

A: Your legs.

Q: What can you catch but never throw?

Q: What has many teeth but cannot bite?

Q: What has branches, but no fruit, trunk, or leaves?

Q: What thrives when you feed it but dies when you water it?

Q: What do you buy to eat but never consume?

A: Cutlery.

Q: Two fathers and two sons are in a car, yet there are only three people in the car. How?

A: They are grandfather, father, and son.

Q: A bus driver goes the wrong way down a one-way street. He passes the cops, but they don’t stop him. Why?

A: He was walking.

Q: If an electric train is traveling south, then which way is the smoke going?

A: There is no smoke—it's an electric train.

Q: Where is the only place where today comes before yesterday?

A: The dictionary.

Q: What can you put in a bucket to make it weigh less?

Q: How can kids drink beer and not get drunk?

A: By sticking to root beer.

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Brain Easer is about the joy of thinking hard and solving puzzles.

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We share and explain a variety of fun and elegant brain teasers and puzzles, so you can challenge yourself, test your critical thinking, and find joy in solving tough problems.

Logic puzzles.

Amy says Brad is lying. Brad says Chris is lying. Chris says both Amy and Brad are lying.

Who is lying and who is telling the truth?

Word Puzzles

What is a special property or feature that all of the following words have in common?

banana, uneven, grammar, voodoo, assess, potato, revive, dresser

Rebus Puzzles

What common word or phrase is this rebus referring to? —


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What Are Brain Teasers?

Who doesn't love to solve riddles and puzzles? Their tricky nature can be frustrating, but solving them is enjoyable.

If you want an activity that makes you think outside of the box, brain teasers are exactly what you need to be solving! Brain teasers are more than just simple puzzles and riddles. Brain teasers are fun to do, but they also boost your brainpower and improve your memory skills. Both kids and adults can enjoy the benefits that brain teasers entail. Brain teasers can be a bit complicated, like all puzzles and riddles, and some often make you ponder for a while.

According to research, any activity that tests the power of your brain using numbers and puzzles is bound to have a positive impact on your brain's activity by strengthening existing neural connections and building new connections. Now, let's try to understand brain teasers with the help of a few examples. Read along to find out.

Brain teasers are forms of word problems, questions, or puzzles that people solve for amusement as they require you to use unconventional and lateral thinking to derive the answers. This often means that the solution is rarely right in front of you, and you have to be creative and less straightforward to solve a brain teaser.

When you finally hear the answer to a brain teaser, you may feel silly as the answer should have been obvious to you. However, mastering brain teasers requires a lot of practice. So, don't be discouraged if you don't reach the answer in the first few attempts.

Teachers often use brain teachers to sharpen the minds of their students by creating a fun learning experience for them that they can enjoy with their classmates. Both children and adults enjoy brain teasers. Companies often use brain teasers during interviews to assess the candidate's ability to be creative and think logically, which are essential skills required in a job.

The different primary types of brain teasers are as follows:

- Riddles - Visual Puzzles - Illusions - Anagrams - Optical illusions - Stories with holes

While solving brain teasers, it is more important how you approach the answer than the answer itself. Your approach is the real test. Let's look at a few examples of brain teasers!

Example #1: "There are three houses. One is red, one is blue, and one is white. If the red house is to the left of the house in the middle, and the blue house is to the right of the house in the middle, where is the white house?" Answer: In Washington, D.C.!

Example #2:

"Jimmy's mother had four children. She named the first Monday. She named the second Tuesday, and she named the third Wednesday. What is the name of the fourth child?" Answer: Jimmy, because Jimmy's mother had four children!

Example #3:

"How can 8 + 8 = 4?" Answer: Think in terms of time: 8 AM + 8 hours= 4 o'clock.

Looking at the three examples of brain teasers, you might notice one thing that's in common: they are not straightforward and require you to think long and hard to solve them. Here are a few simple steps that you can follow to solve brain teasers.

Tips on How to Solve Brain Teasers - We have put together some simple tips that you can use to solve brain teaser problems effectively.

1. Read the question carefully and take a moment to consider what is being asked carefully. You might have a few answers running through your mind as you read it. If you think the answer is too straightforward, it may not be true. You may have to read the brain teaser repeatedly to understand it fully.

2. Relax; you might not understand the problem right away. Try to rewrite it in your own words or think aloud and explain the problem to yourself and make mental notes.

3. List down all possible responses coming to your mind, then reread the problem, and you'll find yourself crossing out a lot of those answers, leaving you with only a couple of answers. Choose the one you think is most likely the answer.

4. Don't feel frustrated if you don't get it right the first time. Practice makes perfect! Brain teasers are tricky, but they provide a great workout for the brain.

Did you know that brain teasers have a lot of benefits besides just being fun and enjoyable? Let's take a look at how they are beneficial for you!

Benefits of Solving Brain Teasers

1. Brain Teasers Improve Your Memory Skills

Brain teasers provide a good workout for your brain. Solving brainteasers reinforces the connections between your brain cells. Solving such problems requires remembering patterns, shapes, and other information, strengthening your memory and concentration skills.

2. Brain Teasers Improve Your Ability to Solve Problems

You need to have good problem-solving skills in all aspects of life, and solving brain teasers can help you develop these skills. While solving these problems, you push yourself and challenge your brain to develop new solutions, improving your critical thinking skills and ability to solve problems in real life.

3. Brain Teasers Reduce Stress

Solving Brainteasers is a healthy and productive activity that puts you in a better mood and reduces stress levels it takes your mind off any negative thoughts. It engages it in solving a problem, which boosts confidence when you get it right.

4. Brain Teasers Improve Your IQ

Since brain teasers improve your cognitive, problem-solving, memory, and critical thinking skills, this helps improve your IQ. According to a study, brain teasers for 25 minutes daily can improve your IQ by 4 points.

Solving brain teasers are fun, and it benefits you by reducing stress level and improving your memory, problem-solving and cognitive skills. Don't miss out and start practicing brain teasers online. You'll master them with time! Solving brain teasers is a way to give your brain a healthy workout.

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5 Brain Teasers to Boost Students Critical Thinking Skills

Brain Teasers to Boost Students Critical Thinking Skills

How to Solve Critical Thinking Brain Teasers

Answers to critical thinking brain teasers, list of brain teasers and riddles.

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10 Brilliant Math Brain Teasers

Tap into rigorous problem-solving and critical thinking with these playful math brain teasers for middle and high school students.  

To break the ice during the first few awkward moments of class in the new school year, high school math teacher Lorenzo Robinson uses an unusual strategy: He reads his students’ minds.

Here’s how the mystical feat unfolds: Each student picks a number between 1 and 100. Next, they use calculators to add, subtract, multiply, and divide their way through a set of predetermined numbers. At the end, everyone ends up with the same answer: 427. Robinson isn’t psychic, of course, but because the mechanics of the teaser are always the same, regardless of which initial numbers his students select, he’s able to correctly “guess” their final result—much to their amazement. 

Starting off the lesson with a math brain teaser sets a playful tone and lowers the stakes for kids, “generating a buzz around my class,” Robinson says. “It makes students feel as though this class is not going to be scary, it’s going to be interesting. ‘We’re going to be learning, but we’re also going to have some fun.’” 

Robinson thinks of math brain teasers as a variation on brain breaks —a brief respite from dense curricular material that gives kids time to pause and process. They can also provide an opportunity to build relationships and community as kids put their heads together to find solutions. Good brain teasers can be sneaky: They get kids developing problem-solving and critical thinking skills. 

Meanwhile, before introducing a new one, Robinson works through the problem himself, identifying questions that students might have along the way and making sure his class has the background knowledge to understand how the teaser works. It’s important, he says, to provide a few minutes for kids to examine and discuss the teaser. Ask them to observe, highlight, and share things that stand out. 

“The most powerful reaction is when a kid doesn’t get the correct answer,” Robinson says, and they ask to try the problem again. “They want to feel what the other kids are feeling, that educational euphoria. They want to do it again because they want to be right.” That organic intellectual curiosity is hugely helpful in high school math, Robinson says, because it can be “parlayed into the other stuff that we do.”

We combed through dozens of math brain teasers to find 10 good ones—including several of Robinson’s tried-and-true favorites.  

Number Magic: I’ll Bet Your Number is… 427

  • Start by having students pick any number between 1 and 100. 
  • Add 28. 
  • Multiply that number by 6. 
  • Subtract 3. 
  • Divide that number by 3. 
  • Subtract 3 more than your original number. 
  • Add 8. 
  • Subtract 1 less than your original number. 
  • Multiply that number by 7. 

And voilà, you’ll correctly identify each student’s final result as 427. Courtesy of: Lorenzo Robinson  

Can Your Shoe Size Tell Your Age? 

  • Start with your shoe size. If you are a half size—for example, size 8.5—round up to 9.
  • Multiply your shoe size by 5. 
  • Add 50. 
  • Multiply that number by 20. 
  • Subtract the year you were born—for example, 1991. Add 1 if you already had your birthday this year. 

The first digit(s) are your shoe size, and the last two digits are your age.  Courtesy of: Lorenzo Robinson.  

Cutting Across a Cross

Ask students to draw a cross on a sheet of paper. Drawing one on the board as a point of reference is helpful. Next, ask students to draw two straight lines that will segment or cut the cross into pieces. The goal is to produce the most pieces.

Illustrated diagram of a math teaser puzzle

The solution can be found here .  Sourced from: .

Number Magic: I’ll Bet Your Final Number is… 5  

  • Start with a positive number. Students shouldn’t say the number out loud.
  • Square that number. 
  • Add 10x the original number to what you have now. 
  • Add 25 to the result of the previous step. 
  • Now take the square root of that number, rounding to the nearest whole number. 
  • Subtract your original number.
  • Before students share their final figure, reveal that you guess their collective result is 5. 

Courtesy of: Lorenzo Robinson.

Birthday Math 

Have students work in pairs and share the following instructions with their partner:

  • Start with the number 7.
  • Multiply that by the month of your birth. For example, if you were born in September, you’d use the number 9 to represent your birth month. 
  • Subtract 1. 
  • Multiply that number by 13. 
  • Add the day of your birth. 
  • Add 3. 
  • Multiply that number by 11. 
  • Subtract the month of your birth. 
  • Subtract the day of your birth. 
  • Divide by 10.
  • Add 11 to that number. 
  • Divide by 100. 

The result on the calculator screen should be their partner’s birthday.  Sourced from: Dr. Mike’s Math Games for Kids .

Coin Conundrum

Ask students to imagine that they have two coins that total 30 cents in value. Have them try to figure out what the two coins are, only providing them with a singular piece of information: One of the coins is not a nickel. The answer: A quarter and a nickel. (Only one of the coins is not a nickel.)

Sourced from: WeAreTeachers .

The Phone Number Trick  

  • Ignoring your area code, type the first three digits of your phone number into a calculator.
  • Multiply that number by 80. 
  • Add 1. 
  • Multiply that number by 250. 
  • Add the last four digits of your phone number. 
  • Add the last four digits of your phone number again. 
  • Subtract 250. 
  • Divide this number by 2. Do you recognize your phone number?

Courtesy of: Lorenzo Robinson. 

A Number Challenge

For a slightly more independent teaser, challenge students to produce a math equation that works using these four numbers—2, 3, 4, and 5—as well as a plus (+) and equal sign (=). Students can work individually, in pairs, or in small groups as they try to create a valid equation. The answer: 2 + 5 = 3 + 4.

Sourced from: WeAreTeachers .  

Math Mind Reader 

Students can work in pairs with this teaser. One person will start off by holding the calculator so their partner cannot see it; the other person can read the steps aloud to the partner with the calculator. 

  • The student with the calculator starts by choosing a whole number from 1 to 20 and writing it down on a piece of paper without letting their partner see it. 
  • Next, the student with the calculator enters their secret number into the calculator. 
  • Multiply that number by 3. 
  • Add the secret number, then subtract 5. 
  • Multiply by 3, then multiply by 3 again. 
  • Add the secret number, then subtract the number of their favorite month (you don’t have to know what month it is). For example, 9 represents the ninth month of the year, September. 
  • Multiply by 3, then multiply by 3 again, and then again a third time. 
  • Add the secret number, then subtract their favorite day of the month (again, you don’t have to know what it is on your end). 
  • Ask them to show the non-calculator partner the result. At this stage, the non-calculator partner can guess the original secret number, even though what appears on the screen may be a very large number. 

If the result is negative, their secret number is 1.

If the result has only three digits, their secret number is 2.

In all other cases, ignore the last three digits, and then add 2 to get the secret number! 

Sourced from: Dr. Mike’s Math Games for Kids .

What’s Unique About This Number?

After writing the number 8,549,176,320 on the board, ask students to observe the number and tell you everything they think is unique about the number.

Answer: It is the digits 0 to 9 in alphabetical order (eight, five, four, nine, one, seven, six, three, two, zero), but it’s surprising and fun to see what students come up with. This number can also be evenly divided by the digits 1 through 9 except for the number 7, for example. 

Sourced from: . 

Critical thinking definition

critical thinking brain teasers

Critical thinking, as described by Oxford Languages, is the objective analysis and evaluation of an issue in order to form a judgement.

Active and skillful approach, evaluation, assessment, synthesis, and/or evaluation of information obtained from, or made by, observation, knowledge, reflection, acumen or conversation, as a guide to belief and action, requires the critical thinking process, which is why it's often used in education and academics.

Some even may view it as a backbone of modern thought.

However, it's a skill, and skills must be trained and encouraged to be used at its full potential.

People turn up to various approaches in improving their critical thinking, like:

  • Developing technical and problem-solving skills
  • Engaging in more active listening
  • Actively questioning their assumptions and beliefs
  • Seeking out more diversity of thought
  • Opening up their curiosity in an intellectual way etc.

Is critical thinking useful in writing?

Critical thinking can help in planning your paper and making it more concise, but it's not obvious at first. We carefully pinpointed some the questions you should ask yourself when boosting critical thinking in writing:

  • What information should be included?
  • Which information resources should the author look to?
  • What degree of technical knowledge should the report assume its audience has?
  • What is the most effective way to show information?
  • How should the report be organized?
  • How should it be designed?
  • What tone and level of language difficulty should the document have?

Usage of critical thinking comes down not only to the outline of your paper, it also begs the question: How can we use critical thinking solving problems in our writing's topic?

Let's say, you have a Powerpoint on how critical thinking can reduce poverty in the United States. You'll primarily have to define critical thinking for the viewers, as well as use a lot of critical thinking questions and synonyms to get them to be familiar with your methods and start the thinking process behind it.

Are there any services that can help me use more critical thinking?

We understand that it's difficult to learn how to use critical thinking more effectively in just one article, but our service is here to help.

We are a team specializing in writing essays and other assignments for college students and all other types of customers who need a helping hand in its making. We cover a great range of topics, offer perfect quality work, always deliver on time and aim to leave our customers completely satisfied with what they ordered.

The ordering process is fully online, and it goes as follows:

  • Select the topic and the deadline of your essay.
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45 Fun and Clever Brain Teasers for Kids with Answers!

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Written by Laney Kennedy

Reviewed by Sarah Tino, M.Ed.

Engage and motivate your students with our adaptive, game-based learning platform!

  • Game-Based Learning
  • What brain teasers are
  • The benefits of brain teasers for kids

Math brain teasers for kids

Sometimes keeping your students engaged during a (long) school day feels like a losing battle. How do you gain their full attention while teaching the skills they need to succeed? How do you turn tough and intimidating concepts into fun, entertaining lessons that actually spark life in the classroom? 

Brain teasers for kids are a great form of game-based learning that not only entertain children but also inspire some creative thought in the classroom. People of all ages can indulge in these playful — yet challenging — activities.

And some examples of when teachers might want to use brain teasers are on a bulletin board in the classroom, as a partnered activity to start a new concept or lesson, or during a rainy day indoor recess box.

We’ve gathered 45 examples of brain teasers for kids with answers, organized by category:

Table of Contents

Language brain teasers for kids :

Riddles ; Language associations ; Lateral thinking problems.

Math brain teasers for kids :

Math riddles ;  Pattern problems ;  Prodigy.

Visual brain teasers for kids :

Spot the difference ;  Rebus puzzles ;  Optical illusions ;  Stroop effect test.

Use the list below to find the perfect brain teaser for your class!

What are brain teasers?

Before you explore our examples, you might be wondering what brain teasers actually are.

Cambridge Dictionary defines a brain teaser as “a problem for which it is hard to find the answer, especially one which people enjoy trying to solve as a game.”

Brain teasers are a type of puzzle — and as the list below reveals, they come in many different forms. Often presented as a riddle, question or activity, brain teasers require a little extra brainpower to solve.

It's important to note that if you have any English language learners in your class, brain teasers for kids might pose a challenge for them. If that's the case, they might need you to walk them through the brain teaser more closely, or you can find ones that better suit their language level.

Brain teasers for kids differ from other complex or abstract problems because they’re usually done for fun. Although you can use them to analyze problem-solving and critical thinking skills, they’re often used as an amusing activity to encourage logical and lateral thinking , or thinking “outside the box.”

45 Brain teasers for kids

We’ve compiled a list of language, math and visual brain teasers to get your students thinking. Get inspired by the examples below — including answers!

Language brain teasers for kids

When you hear the term “brain teaser,” a riddle is likely the first thing that comes to mind. Riddles are perplexing — sometimes misleading — questions or statements that require creative thought to solve.

Riddles are usually fun, and plenty of them can add some humour to your classroom.

Enjoy our list of riddles for kids below!

a) Billy’s mother had five children. The first was named Lala, the second was named Lele, the third was named Lili, the fourth was named Lolo. What was the fifth child named?

b) Choose the correct sentence: “The yolk of the egg is white” or “the yolk of the egg is white.”

c) It’s as light as a feather, but the strongest person can’t hold it for more than five minutes. What is it?

d) The more there is, the less you see. What is it?

e) What gets more wet while it dries?

f) You can find it in Mercury, Earth, Mars, Jupiter and Saturn, but not in Venus or Neptune. What is it?

g) It likes food, but water kills it. What is it?

h) What’s full of holes but can still hold water?

i) Which is heavier, a pound of feathers or a pound of rocks?

j) How far can a dog run into the woods?

k) You’re driving a city bus. At the first stop, three women get on. At the second stop, one woman gets off and a man gets on. At the third stop, two children get on. The bus is blue and it’s raining outside in December. What colour is the bus driver’s hair?

l) There are three houses. One is red, one is blue and one is white. If the red house is to the left of the house in the middle, and the blue house is to the right of the house in the middle, where’s the white house?

m) It’s at the center of gravity and you can find it in Venus, but not Mars. What is it?

n) What goes on four feet in the morning, two in the afternoon and three in the evening?  (This is from the classic myth,  Oedipus and the Riddle of the Sphinx )

o) What travels faster: heat or cold?

p) A man was walking in the rain in the middle of nowhere without a coat or an umbrella. He got soaked, but not a single hair on his head was wet. How can this be?

q) A cowboy rode into town on Friday. He stayed in town for three days and rode back out on Friday. How is this possible?

b) Neither. Egg yolks are yellow, not white!

f) The letter “R”

h) A sponge

i) Neither. Both weigh a pound!

j) Halfway. Once it reaches halfway, it’s running  out  of the woods.

k) Whatever colour your hair is. Remember, you’re driving the bus!

l) In Washington, D.C.

m) The letter “V”

n) A human. The times of day represent stages of human life. At the beginning of life, a baby crawls on four “feet.” As a person gets older, they walk on two feet. Later in life, a person will walk on three “feet” (two feet, plus a cane to help them walk).

o) Heat travels faster because you can catch a cold!

p) He was bald.

q) The horse’s name was Friday.

As a bonus, use these riddles to challenge preconceived notions and get students thinking about natural bias .

a) Two boxers are in a match scheduled for 12 rounds. (Pure boxing only - no kicking, UFC takedowns, or anything else). One of the boxers gets knocked out after only six rounds, yet no man throws a punch. How is this possible?

b) A father and son have a car accident and both are very injured. They are taken to separate hospitals for treatment. When the boy is taken in for an operation, the surgeon says, “I can’t do this surgery…. this boy is my son!” How is this possible?

a) The two boxers are women.

b) The surgeon is the boy’s mother.

2. Language associations

These brain teasers for kids explore the complexities of the English language. Use them to boost student knowledge of sounds, words, spelling, categorization and more.a)  Word association : find a word that associates with the following sets of words.

  • Cake, swiss, cottage
  • Glasses, screen, day
  • Cream, cube, cap
  • Knife, fly, cup

b) Find the mystery word . Replace the third letter of each word with a new letter to create a different word. When read vertically, the new letters will reveal the mystery word.

For example, the word MA K E could become MA R E, MA L E, MA T E and so on. It’s your job to figure out which one works to create the mystery word. 

Hint: It’s something you’ll find outside.

c) Find rhyming pairs . Unscramble the words below so that each pair of words rhymes.


Mystery word: FLOWER

  • BEAR (or BARE) & SHARE

You can also use printable brain teasers for kids like this one:


Image source: Spelling Words Well

Answer: The “happy word” is SMILE.

3. Lateral thinking problems

Lateral thinking problems require creative thinking with an indirect approach.

These questions require logic and careful thought to solve. The most notable example of a lateral thinking problem is the classic Monty Hall problem .

Here are two examples of lateral thinking problems kids can try to solve.

a) The river crossing problem


Image source: Popular Mechanics

A farmer is travelling with a fox, a goose, and a bag of beans. During his journey, he comes across a river with a boat to cross it.

The farmer can only fit one thing in the boat with him at a time. If left alone together, the fox will eat the goose or the goose will eat the beans. How does the farmer get everything across the river safely?

b) The light bulb problem


There are three light switches outside of a room-- labeled number one, number two, and number three. The door to the room is closed and you can’t see in. All three switches are off.

You need to figure out which switch belongs to which bulb. You can use the switches however you want to, but can only enter the room once. How do you do it?

a) Here’s the step-by-step solution:

  • The farmer brings the goose across the river first (if he leaves the goose alone, it will either eat the beans or be eaten by the fox).
  • The farmer brings either the fox or the beans across and leaves the other one alone.
  • Now the farmer has two items on the other side of the river, including the goose. If he leaves the goose again, the same problem will occur. So, the farmer must bring the goose back to the other side.
  • The farmer brings the other item back (either the fox or the beans) and leaves the goose alone again. The fox and the beans are now on the other side of the river.
  • The farmer returns and brings the goose across the river again.

b) Turn on the first switch and leave it on. Turn on the second switch for a few minutes, and then turn it off again. When you enter the room, one light bulb will be on. You’ll know it goes with switch one because you turned it on. Another bulb will be hot. You’ll know that goes with switch two because it was on for a little while. The bulb that’s off and cold goes with switch three because you didn’t touch it.

Like math puzzles , these brain teasers for kids can increase engagement with math content and inspire your students to work on math concepts and problems outside of regular lessons.

1. Math riddles

These riddles are just as amusing as the ones above, but they’re math-focused . Use them to give students some extra math practice and encourage resourceful thinking.

Math riddles

a) Divide 30 by ½ and add 10. What’s the answer?

b) A clerk at the butcher shop is six feet tall and wears size 10 shoes. What does he weigh?

c) A farmer has 19 sheep on his land. One day, a big storm hits and all but seven run away. How many sheep does the farmer have left?

d) Your sock drawer only contains 18 white socks and 18 blue socks. How many times do you need to reach inside the drawer and take out a sock to guarantee a matching pair?

e) You planted sunflower seeds in your back garden. Every day, the number of flowers doubles. If it takes 52 days for the flowers to fill the garden, how many days would it take for them to fill half the garden?

f) Using only addition, how can you use eight eights to get the number 1,000?

g) When Ashley was 15, her mother was 37. Now, her mother is twice her age. How old is Ashley?

a) It's 70. You’re dividing 30 by ½, not by two. Thirty divided by ½ is the same thing as multiplying it by two, which is 60. Plus 10 makes 70!

b) Meat. He works at the butcher shop, so he weighs meat for a living.

c) Seven. The riddle says  all but seven  run away, meaning there are seven left who didn’t.

d) Three times. On the third time, you’ll get either a white or a blue sock to match with one of the other two you’ve already grabbed.

e) It would take 51 days. If the number of flowers doubles every day, half the garden would be full the day before, on the 51st day.

f) 888 +88 +8 +8 +8

g) Ashley is 22. Her mother is 22 years older, so when Ashley is 22, she’s now half her mother’s age.

2. Pattern problems

These questions require students to identify a pattern before they can answer a particular question. Kids must use creative and logical thinking to find the answers.

4 + 4 = 168

5 + 5 = 2510.

b) What makes this number unique: 8,549,176,320?

c) Solve the pattern puzzle below. Find the missing number to replace the question mark.


Image source: Genius Puzzles

d) Solve the following:


Image source: AOL

a) The missing number is 3612. The answer is the number multiplied by itself and then the number added to itself. Six multiplied by six is 36, and six plus six is 12.

b) It contains each one-digit number, zero through nine, listed in alphabetical order.

c) The missing number is 17. Each number in the circle is the sum of the numbers in the opposite quadrant. In this case, the numbers are eight and nine — added together makes 17.

d) The answer is 14 (or 16), if you’re on the other side of the debate .

3. Prodigy Math Game

Screenshot of Prodigy Math Game battle

This math activity is a bit different from others on the list. It’s not a traditional brain teaser, but it can also be used as a fun, skill-building alternative to traditional math class.

Prodigy is a game-based learning platform that takes your students on an online fantasy adventure while they answer standards-aligned math questions. It’s engaging and effective at teaching necessary skills. 

Prodigy's free teacher tools help you differentiate learning, send assessments in-game and even collect student insights!

Visual brain teasers for kids

1. spot the difference.

This ever-popular activity might remind you of your own childhood — and kids still love it! Spot the difference puzzles require lots of deduction and attention to detail.

Here’s an example of a printable spot the difference activity.


Image source: Tim’s Printables


2. Rebus puzzles

A rebus is a visual word puzzle that uses lateral thinking to find its intended meaning. The word or phrase is depicted with a visual illustration, including letters and words. Students must think creatively to figure out the meaning from the clues they’re given. 


Image source: Wikipedia


Image source: Stack Exchange

a) Top secret

b) Think outside the box

Visit the link below if you want more fun rebus puzzles for your students:

3. Optical illusions

Get tricky with your students! Optical illusions use visual tricks that alter the perception of what you’re really seeing. Students will love trying to figure out what’s really going on in these examples.

a) How many legs does the elephant have?


Image source: Optics For Kids

b) Are the two squares different colours?


Image source: Brain Den

b) They’re exactly the same colour. If you place your finger over the spot where the squares meet, you can see they’re the same. Try this impossible paper puzzle if you want a more hands-on optical illusion. You can make one to show your class, then have students make their own as a fun brain teaser to show friends and family.

4. Stroop effect test

The Stroop effect was discovered in the 1930s by John Ridley Stroop. During the test, you’re given a list of colour names, with each word being a different colour than what they describe.

The test involves saying the colour of a word, rather than reading the word itself. Your mind must process the two conflicting pieces of information, which slows down reaction speed and requires careful thought to get through.


Image source: The Crafty Classroom

Benefits of brain teasers for kids

You know your students enjoy them, but did you know there are plenty of additional reasons to make brain teasers a regular activity in the classroom?

A study on the attention spans of six-year-olds found children who were given brain teasers were more attentive than those who were not — showing brain teasers were effective at boosting children’s attention spans.   

Brain teasers for kids can also:

  • Strengthen problem solving and critical thinking skills
  • Encourage lateral thinking and build new perspectives
  • Improve cognitive abilities like memory and processing speed
  • Inspire teamwork and communication
  • Engage students and motivate them to learn
  • Provide necessary breaks from traditional class work

How to use brain teasers in the classroom

In addition to their many learning advantages, brain teasers are a great way to break up the day and engage your students. Here are just a few ways you can use brain teasers for kids as a teaching strategy and maximize the benefits in your classroom:

  • Engagement-boosting activity before or after lessons
  • Bonus questions in assignments and tests
  • Optional “free time” activity
  • Encourage team building — split students into groups to solve them together
  • Supplement lessons — choose brain teasers about the subject you’re teaching

Final thoughts on brain teasers for kids

No matter what subject or skill you want to focus on, a brain teaser is a great addition to traditional teaching methods. Plus, it’s something students will actually be excited to do.

Remember that brain teaser are designed to be fun for kids. it’s not about finding the right answer, but the mental exercise they get from trying to find the solution.

Use any of the brain teasers in this list whenever you need a boost of energy in your classroom. Bonus points if you can stump any adults!

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Brain Teaser IQ Test: Find the ghost in the park in 4 seconds!

Brain Teaser IQ Test: Only highly attentive people can spot the ghost in the park in 4 seconds. Are you one of them? Test your intelligence now!

Mrigank Chakraborty

Brain teasers test the reader's critical thinking and problem-solving skills. These challenges have the potential to boost intelligence and improve concentration.

The most common types of brain teasers involve finding a mistake, solving a code, or spotting the hidden object in the picture.

Regular practice of such challenges helps enhance problem-solving skills and also provides a healthy workout for the brain.

Are you highly attentive?

Let’s find out!

Brain Teaser IQ Test: Find the Ghost in 4 Seconds

critical thinking brain teasers

Source: YouTube

In the image shared above, four guys can be seen in the park.

One of them is a ghost and the challenge for the readers is to spot him in 4 seconds.

This brain teaser puzzle will test your attention to detail.

Your time starts now!

Look at the image and study it carefully.

Have you spotted the ghost?

Hurry up; time is running out.

Study the image attentively; you might be very close to spotting the ghost.

Congratulations to those readers who have spotted the ghost.

Those who couldn’t can scroll below for the solution.

Brain Teaser IQ Test: Solution

The ghost is the guy in the teal and white t-shirt; his ankles are pointed backwards.

critical thinking brain teasers

If you loved solving this picture puzzle, share it with your friends and family and see who performs the best.

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Test your visual acuity by finding a butterfly in the picture in 5 seconds!

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The Times of India

Brain teaser: Can you solve this simple maths puzzle?

I nternet is an amazing place if you are looking for puzzles, riddles and brain teasers. Social media platforms serve as a healthy medium for engaging in such interesting activities.

Here is one such question that has left the internet baffled.

Question: A man steals a $100 dollar bill from a store's register. Then he buys $70 worth of goods at that store using the $100 bill and gets $30 change. How much did the store lose?

Netizens have been scratching their head to find the right answer to this question.

Riddle explained

In this scenario, the man essentially used the stolen $100 bill to purchase $70 worth of goods, receiving $30 in change. However, it's important to recognize that the $100 bill was never rightfully his to begin with—it was stolen from the store's register. Therefore, the store incurs a loss equivalent to the value of the stolen money, which is $100.

READ ALSO: Optical illusion: Spot the dog around the rocks in under 5 seconds

READ ALSO: Brain Teaser: You are among the elite 1 percent if you can identify the box that contains the car

When the man used the stolen $100 bill to pay for the goods, the store effectively received no payment for the items he took. Despite receiving $30 in change, this does not offset the loss incurred by the theft. The $70 worth of goods obtained through the stolen bill is essentially a loss for the store, as it represents merchandise taken without legitimate payment.

Furthermore, the store suffers additional losses beyond the monetary value of the stolen bill. There are costs associated with investigating the theft, potential loss of trust from customers, and potential impacts on the store's reputation. Therefore, while the immediate monetary loss is $100, the overall impact of the theft on the store's operations and reputation could be far greater.

Solving brain teasers boosts your cognitive function

Solving brain teasers offers numerous benefits for cognitive function and mental agility. These puzzles stimulate critical thinking, problem-solving skills, and creativity, enhancing overall cognitive abilities. Regular engagement with brain teasers can improve memory retention, increase concentration, and boost mental acuity. Furthermore, solving puzzles provides a fun way to challenge the brain, reducing stress and promoting a sense of accomplishment. By incorporating brain teasers into daily routines, individuals can maintain cognitive health, sharpen their minds, and enjoy the satisfaction of overcoming mental challenges.

For more news like this visit TOI . Get all the Latest News , City News , India News , Business News , and Sports News . For Entertainment News , TV News , and Lifestyle Tips visit Etimes

Brain teaser: Can you solve this simple maths puzzle?


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