Get Ready for Brainteasers of Any Kind

Logicians
Brainteaser: Logicians
A convention is held where all the big logicians are summoned. The master places a band on everyone’s forehead. Now all of them can see the others’ bands but can’t see their own. Then they are told that there are different colors of bands. All the logicians sit in a circle and they are further explained that a bell will ring at regular intervals. The moment when a logician knows the color of band on his forehead, he has to leave at the next bell. If anyone leaves at the wrong bell, he will be disqualified. The master assures the logicians that the puzzle will not be impossible for anyone of them. How will the logicians manage?
Lion and Tamer
Brainteaser: Lion and Tamer
A lion and its tamer are standing inside a cage that measures 1 unit in radius. Both of them can effortlessly run at the speed of 1 unit maximum. 1) Suppose the lion is hungry, will he be able to eat up the tamer? 2) If yes, how long can the tamer survive?
Time
Brainteaser: Time
Suppose you have one 11 minute hourglass and one 13 minute hourglass. Can you measure exactly fifteen minutes using them?
Octopuses
Brainteaser: Octopuses
The king of Octopuses has servants who have six, seven or eight legs. The distinguishing characteristics of the servants are that the one with seven legs always lie but the one with either six or eight legs speak the truth always. On a certain night, four servants meet and converse: The black one says, 'We have 28 legs altogether.' The green one says, 'We have 27 legs altogether.' The yellow one says, 'We have 26 legs altogether.' The red one says, 'We have 25 legs altogether.' Can you identify the color of the servant who is speaking the truth?
Brainteasers are a helpful exercise to train your logical thinking.
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Jigsaw
Brainteaser: Jigsaw
Welcome to the deadly game played by the serial killer Jigsaw. You are tied to a chair and you cannot move your hands or get up. Jigsaw shows you an empty gun with all the six chambers empty. He puts two bullets in adjacent chambers and closes the barrel. He spins it and points the gun to your head. The first shot snaps. It was an empty slot. Now before pressing the trigger again, he asks you whether to pull the trigger or to spin the barrel first and then pull the trigger. If the second shot goes empty, he will spare you. What will you choose? Also think what will you chose if the bullets are not in adjacent chambers.
Box with Balls
Brainteaser: Box with Balls
There are ten boxes containing some balls. Each of the ball weighs exactly 10 grams. One of those boxes has defective balls (all the defective balls weigh 9 grams each). An electronic weighing machine is provided to you and you are allowed only one chance of weighing on it. How will you find out which box has defective balls?
Handshake
Brainteaser: Handshake
Daniel and Isabel invited three couples for dinner. When they meet, not everyone is shaking hands with everyone. Later that evening Daniel asks, who shook how many hands. Although nobody shook the hand of his or her own partner, and nobody shook the hand of a person more than once, everyone is naming a different amount of handshakes. How many hands shook Isabel?
What am I?
Brainteaser: What am I?
If you throw me from the window, I will leave a grieving wife. Bring me back, but in the door, and You will see someone giving life! What am I?
The Explorer
Brainteaser: The Explorer
An explorer goes on an expedition in the jungle. He sets up a camp in the middle of the jungle. The next morning he sees something with a head and a tail, but he is not afraid. What did he see?
What is it?
Brainteaser: What is it?
It's pretty hard to give up. If you remove a part of it, you will be left with a bit. Even if you remove another part, bit still remains. Remove one more and it still remains. What is it?
ABCDE and then?
Brainteaser: ABCDE and then?
ABCDE and then? What comes next in this series?
What is it?
Brainteaser: What is it?
The manufacturer doesn't want to use it, the buyer doesn't need to use it and the user doesn't know he's using it. What is it?
What Number am I?
Brainteaser: What Number am I?
I am an odd number. Take away one letter and I become even. What number am I?
What do you light first?
Brainteaser: What do you light first?
You are in a dark room with a candle, a wood stove and a gas lamp. You only have one match, so what do you light first?
Cigars
Brainteaser: Cigars
A homeless man collects cigar butts. Because cigars cannot be smoked entirely, he makes a cigar out of every 5 butts that he finds. Today, he has collected 25 cigar butts. How many cigars will he be able to smoke?
Eat the burger
Brainteaser: Eat the burger
Two mothers and two daughters went out to eat, everyone ate one burger, yet only three burgers were eaten in all. How is this possible?
Snow Ball
Brainteaser: Snow Ball
One snowy night, Santa Claus was in his house sitting by a fire. All of a sudden a snowball came crashing through his window, breaking it. Santa got up and looked out the window just in time to see three kids who were brothers run around a corner. Their names were John Crimson, Mark Crimson and Paul Crimson. Santa wondered which of the three kids broke his window, to rethink his Christmas present. The next day Santa got a note on his door that read '? Crimson. He broke your window.' Which of the three Crimson brothers should Santa Claus question about the incident?
Christmas Candy
Brainteaser: Christmas Candy
It is one day before Christmas and you are expecting 100 guests at your great Christmas party tomorrow. Unfortunately your dog ate all the Christmas candy you bought as a gift for your guests. Hence, you have to buy new candy, one for each guest. Therefore, you have $100 with you and you have to buy 100 candies with it. 100 is the exact figure and you cannot go below or above the numbers and you have to use the entire $100. If there is no kind of tax applied how many of each of the following candies will you be able to buy: Green candy costing $6 Yellow candy costing $3 Black candy costing $0.10 Now, how many of each must you buy to fulfill the condition given?
Stars
Brainteaser: Stars
In the figure, you can see nine stars. What you have to do is connect all of them by using just four line and without lifting your hand i.e. in a continuous flow. Can you find a method to achieve it?
Christmas Party
Brainteaser: Christmas Party
At a Christmas Party, everyone shook hands with everybody else. There were 66 handshakes. How many people were at the party?
Christmas Game
Brainteaser: Christmas Game
A family consisting of four people – Anna, Brian, Christy and Drake is sitting together under the Christmas tree. They are playing a game where they are asked to choose any number between 1 and 5. Can you calculate the probability that any of them chose the same number?

Questions

Frequently Asked Questions
We are happy to answer the most frequently asked questions.

Brain teasers in the form of math problems and logic puzzles can still appear in interviews, but they are quite rare. More common now are market sizing guesstimates, such as “How many tennis balls can fit into a smart car?” These questions may also be referred to as brain teasers. In general, brain teasers test your creativity and ability to think outside the box.

Brain teasers are uncommon in interviews, and there is no specific rule regarding when an interviewer may choose to use one. However, they are more typical in final rounds and can be asked either before or after the main case discussion.

Market sizing guesstimates are often referred to as brain teasers as well. They are more common in interviews and consist of questions that ask you to determine a specific quantity, such as “How many golf balls can you fit into a passenger Boeing 747?” These questions test your ability to define a problem, break it down into assumptions, and use math to solve it.

Always prioritize case studies and the personal fit portion in your interview preparation, as these are the crucial aspects of your interview! Once you feel more comfortable with those, you can integrate some brain teaser practice into your preparation. This may give you the advantage you need to stand out among other candidates! You can use our brain teaser library to challenge your creative thinking. Have fun!

Brain Teaser – Challenge Your Logical and Numerical Thinking

A brain teaser is a riddle or puzzle designed to challenge your logical thinking. In interviews, interviewers may use them to gain insights into your logical and creative thinking skills, which are valuable in various careers. The most important aspect here is not just the answer but how you approach the problem. Practice our brain teasers to prepare yourself for any interview situation!