Puzzle | The Einstein's Puzzle - GeeksforGeeks (2024)

Puzzle | Man fell in well Puzzle

A man fell in a 50m deep well. He climbs 4 meters up and slips 3 meters down in one day. How many days would it take for him to come out of the well? Answer: 47days Explanation: On the first day, the man climbs 4 meters up and slips 3 meters down, therefore he only climbs 1 meter up totally.On the second day, again he climbs 1 meter up, so the tota

Puzzle - A LITTLE TRAIN PUZZLE

A nonstop express going sixty miles an hour starts from Bustletown for Ironchester, and another nonstop express going forty miles an hour starts at the same time from Ironchester for Bustletown. How far apart are they exactly an hour before they meet?Because the two stations cannot be found on any map or gazetteer, we cannot state the distance betw

Puzzle 15 | (Camel and Banana Puzzle)

A person has 3000 bananas and a camel. The person wants to transport the maximum number of bananas to a destination which is 1000 KMs away, using only the camel as a mode of transportation. The camel cannot carry more than 1000 bananas at a time and eats a banana every km it travels. What is the maximum number of bananas that can be transferred to

Puzzle 24 | (10 Coins Puzzle)

You are blindfolded and 10 coins are placed in front of you on the table. You are allowed to touch the coins but can’t tell which way up they are by feel. You are told that there are 5 coins head up, and 5 coins tails up but not which ones are which. Can you make two piles of coins each with the same number of heads up? You can flip the coins any n

Puzzle 27 | (Hourglasses Puzzle)

Puzzle: Given two hourglass of 4 minutes and 7 minutes, the task is to measure 9 minutes. Solution: At 0 minutes: Start both hourglasses at the same time. At 4 minutes: 4 minutes hourglass runs out and flip it. 7 minutes hourglass is left with 3 minutes. At 7 minutes: 4 minutes hourglass is left with 1 minute. 7 minutes hourglass runs out and flip

Puzzle 28 | (Newspaper Puzzle)

Question: A newspaper made of 16 large sheets of paper folded in half. The newspaper has 64 pages altogether. The first sheet contains pages 1, 2, 63, 64. If we pick up a sheet containing page number 45. What are the other pages that this sheet contains? Answer: On the back of 45, it is 46. The pages are such that for each page p, 65-p will be also

Puzzle 31 | (Minimum cut Puzzle)

Puzzle: You have got someone working for you for five days and a gold bar to pay him. You must give them a piece of gold at the end of every day. What are the fewest number of cuts to the bar of gold that will allow you to pay him 1/5th each day? Answer: 2 cuts. Solution: Explanation 1: After two cut there are three pieces of [1 unit and two 2 unit

Puzzle 33 | ( Rs 500 Note Puzzle )

A Lady (L) bought an item of Rs 100 from the Shopkeeper (C). She paid him through a 500 Rs Note. Realizing that he did not have change, the shopkeeper C got change for that note from another shopkeeper (S) and paid Rs 400 to the Lady. After a few days, S realized that the note is fake, And this railed at C and took 500 Rs back from him. So in this

Puzzle 36 | (Matchstick Puzzle)

Question: How to make 4 equilateral triangles with 6 identical match sticks? Method - I: Make a tetrahedron. Method-II: Method - III: Make one equilateral triangle by three sticks . then put each remaining stick on straight line passing through middle points of each two arms of triangle. Method IV: https://youtu.be/DqLOC85SVHQ

Puzzle 38 | (Tic Tac Toe Puzzle)

Statement: The game of Tic-Tac-Toe is being played between two players and it is in below state after six moves. Can you answer following questions? Who will win the game, O or X? Which was the sixth mark and at which position? Assume that both the players are intelligent enough. Solution: O will win the game. The sixth mark was X in square 9. Expl

Puzzle 39 | (100 coins puzzle)

This puzzle is similar to 10 Coins Puzzle. Question: 100 coins are lying flat on a table. 10 of them are heads up and 90 are tails up.You can't see which one is which.How can we split the coins into two piles such that there are same number of heads up in each pile? Note: It is allowed to flip the coins of one pile once. Answer: Make 2 piles with 1

Puzzle 51| Cheryl’s Birthday Puzzle and Solution

(Wiki) Cheryl's Birthday is the unofficial name given to a mathematics brain teaser that was asked in the Singapore and Asian Schools Math Olympiad, and was posted online on 10 April 2015 by Singapore TV presenter. It is an interesting problem and might be asked in the interviews. It is based on logical deduction. It doesn’t require any prior mathe

Puzzle 85 | Chain Link Puzzle

You have five pieces of chain, each consisting of three links. You want to make one long chain of these five pieces. Breaking open a link costs 1 Rs, and welding an open link costs 3 Rs. Is it possible to make one long chain of the five pieces, if you have just 15 Rs? Solution: Let us name the chains as 1, 2, 3, 4, 5 each having three links. Take c

Puzzle | 3 Priests and 3 devils Puzzle

There are 3 devils and 3 Priests.They all have to cross a river in a boat.Boat can only carry two people at a time.As long as there are equal number of devils and priests,then devils will not eat Priest.If the number of devils are greater than the number of priests on the same side of the river then devils will eat the priests.So how can we make al

Puzzle 29 | (Car Wheel Puzzle)

Puzzle: A car has 4 tyres and 1 spare tyre. Each tyre can travel a maximum distance of 20000 km before wearing off. What is the maximum distance the car can travel before you are forced to buy a new tyre? You are allowed to change tyres (using the spare tyre) an unlimited number of times. Answer: 25000 kmsSolution: Divide the lifetime of the spar

Puzzle 81 | 100 people in a circle with gun puzzle

100 people standing in a circle in an order 1 to 100. No. 1 has a sword. He kills the next person (i.e. No. 2) and gives the sword to the next (i.e. No. 3). All people do the same until only 1 survives. Which number survives at the last? There are 100 people starting from 1 to 100. Solution: 73rd person will survive at last Explanation 1 (intuitive

Puzzle 34 | (Prisoner and Policeman Puzzle)

Policeman decided to punish the Prisoner and asked him to make a statement. The Prisoner should make such a statement so that he would be alive. If the statement is held true by Policeman, the Prisoner will be hanged to death and if the statement is held false, the Prisoner will be shot dead. Answer: The Prisoner said, 'I will be shot dead'. If the

Puzzle | Elevator Puzzle

A man works on the 10-th floor and takes the elevator down to ground level at the end of the day. Yet every morning, he only takes the elevator to the 7th floor, even when in a hurry. But he goes all the way to the 10-th floor when others are in the elevator with him or it is a rainy day. Why? Solution: He is too short to reach the "10" button on t

Puzzle 2 | (Find the ages of daughters)

Alok has three daughters. His friend Shyam wants to know the ages of his daughters. Alok gives him a first hint. 1. The product of their age is 72. Shyam says this is not enough information Alok gives him a second hint. 2. The sum of their ages is equal to my house number. Shyam goes out and looks at the house number and tells “I still do not have

Puzzle 11 | ( 1000 Coins and 10 Bags )

A dealer has 1000 coins and 10 bags. He has to divide the coins over the ten bags so that he can make any number of coins simply by handing over a few bags. How must divide his money into the ten bags? Solution: The idea of filling coins in the powers of 2 can be get from the condition that was given the question that each bag can be given or not g

Puzzle 20 | (5 Pirates and 100 Gold Coins)

There are 5 pirates, they must decide how to distribute 100 gold coins among them. The pirates have seniority levels, the senior-most is A, then B, then C, then D, and finally the junior-most is E. Rules of distribution are: The most senior pirate proposes a distribution of coins.All pirates vote on whether to accept the distribution.The distributi

Puzzle 70 | Tom and Jerry

Once upon a time Tom and Jerry thought of having a race on a circular track. The diameter of the track was 200 yards. They both started from same starting point. Tom being confident did not move until he found jerry has moved 1/8-th of the distance.Now Tom starts to move and meets jerry on the circular track. Tom finds that at this point of time ,h

Puzzle | Random Seating

People are waiting in line to board a 100-seat airplane. Ajay is the first person in the line. Ajay gets on the plane but he forgets his seat number, so he picks a seat at random. After that, each person who gets on the plane sits in his assigned seat if it’s available otherwise chooses an open seat at random to sit in. The flight is full and you a

Puzzle | Haunted House Escape

Two friends Ram and Shyam were travelling through a forest. They were hungry and it was late at night. They were looking for shelter and after a long journey they found a haunted house. They decided to stay there and leave in the morning. There was no light and electricity and also it was raining heavily at night. They took some photographs of the

Puzzle | 3 cuts to cut round cake into 8 equal pieces

Puzzle: You have a birthday cake and have to cut it into 8 equal pieces by making 3 cuts only. How do you do it? Solution: The solution can be divided into 3 basic steps. But apart from this there are also other method of executing this task. Step 1: Cut the cake into quarters (4 pieces) using 2 of the cuts – one horizontally down the centre of the

Puzzle | 3 Glass and 10 Coins

Suppose we have 3 glasses and 10 coins. The problem is to place odd number of coins in each glass i.e. each glass should contain coins and the number of coins in each glass must be odd and total coins which will be used must be equal to 10. Solution: It is not possible to use all 10 coins with each glass having odd number of coins. Therefore, we mu

Puzzle | Divide square land among 4 sons

There is an old man and he has four sons. The old man is in critical situation and his last wish is to divide his square land into 4 equal parts but according to some rules. Rules and the image of land is provided below: Rules: Each son should get one tree separately Each son should have direct access to the well Land can't be divided diagonally Ea

Puzzle | Height of Building

There is man on the terrace of a building and he wants to find the height of the building. Man wears a watch only and does not have any instruments to measure anything. There are also some stones on the terrace. How can he find the height of the building from terrace ? Solution: The man can find height of building by using stone and watch. First, h

Puzzle | Divide crescent moon into 6 parts in just two straight lines

Puzzle: We have to divide crescent moon in 6 parts, parts size does not matter. Only we have to cut the crescent moon in a way that it should divided into 6 parts but by using only two straight lines? Solution: We can solve the above puzzle in the below way, and we have to cut the moon is a way that two lines must go over each other that increases

Puzzle | Chances Of Second boy Child Problem

James and Calie are a married couple. They have two children, one of the child is a boy. Assume that the probability of each gender is 1/2. What is the probability that the other child is also a boy? Answer : 1/3 Solution : This is a famous question in understanding conditional probability, which simply means that given some information you might b