Brain Teasers & Puzzles

One day three Greek philosophers settled under the shade of an olive tree, opened a bottle of Retsina, and began a lengthy discussion of the Fundamental Ontological Question: Why does anything exist?
After a while, they began to ramble. Then, one by one, they fell asleep.
While the men slept, three owls, one above each philosopher, completed their digestive process, dropped a present on each philosopher’s forehead, the flew off with a noisy “hoot.”
Perhaps the hoot awakened the philosophers. As soon as they looked at each other, all three began, simultaneously, to laugh. Then, one of them abruptly stopped laughing. Why?
View SolutionSubmit Solution 5185 views
 1 answers
 0 votes

The five pirates mentioned previously(http://puzzlefry.com/puzzles/goldcoinspuzzle/)are joined by a sixth, then plunder a ship with only one gold coin.
After venting some of their frustration by killing all on board the ship, they now need to divvy up the one coin. They are so angry, they now value in priority order:
1. Their lives
2. Getting money
3. Seeing other pirates die.So if given the choice between two outcomes, in which they get the same amount of money, they’d choose the outcome where they get to see more of the other pirates die.
How can the captain save his skin?
View SolutionSubmit Solution 41558 views
 3 answers
 0 votes

Five puzzleFry ship’s pirates have obtained 100 gold coins and have to divide up the loot. The pirates are all extremely intelligent, treacherous and selfish (especially the captain).
The captain always proposes a distribution of the loot. All pirates vote on the proposal, and if half the crew or more go “Aye”, the loot is divided as proposed, as no pirate would be willing to take on the captain without superior force on their side.
If the captain fails to obtain support of at least half his crew (which includes himself), he faces a mutiny, and all pirates will turn against him and make him walk the plank. The pirates start over again with the next senior pirate as captain.
What is the maximum number of coins the captain can keep without risking his life?
View SolutionSubmit Solution 94459 views
 6 answers
 4 votes

A king wants his daughter to marry the smartest of 3 extremely intelligent young princes, and so the king’s wise men devised an intelligence test.
The princes are gathered into a room and seated, facing one another, and are shown 2 black hats and 3 white hats. They are blindfolded, and 1 hat is placed on each of their heads, with the remaining hats hidden in a different room.
The king tells them that the first prince to deduce the color of his hat without removing it or looking at it will marry his daughter. A wrong guess will mean death. The blindfolds are then removed.
You are one of the princes. You see 2 white hats on the other prince’s heads. After some time you realize that the other prince’s are unable to deduce the color of their hat, or are unwilling to guess. What color is your hat?
Note: You know that your competitors are very intelligent and want nothing more than to marry the princess. You also know that the king is a man of his word, and he has said that the test is a fair test of intelligence and bravery.
View SolutionSubmit Solution 4686 views
 1 answers
 0 votes

We have an egg problem again. There is a 36 story building for which you have complete access. You have two eggs and you must follow the below facts:
An egg that does not breaks on falling can be re used.
1) A broken egg will be discarded immediately
2) All the eggs will experience the same effect of the fall as all the eggs are identical.
3) Suppose if an egg breaks on falling from first floor, it will definitely break from all the floors above the first floor.
4) If an egg does not breaks from falling from the thirty sixth floor, it will not break from all the floor below it as well.
5) All you have to do is find out the minimum drops with which you can determine the floor which is safe to drop eggs from.
View SolutionSubmit Solution 3827 views
 1 answers
 0 votes

You have infinite supply of water. You also have 5 quart and 3 quart buckets. What is the least number of steps you will require to measure precisely 4 quarts?
View SolutionSubmit Solution 3836 views
 1 answers
 0 votes

Here is a situation. You have 10 boxes that contains balls with each of the ball weighing 10 grams precisely. Now among the boxes, one of the box comprises of defective balls with each defective ball weighing 9 grams. You have been provided with an electronic weighing machine but you are allowed to use it only once.
Can you find out which box contains defective balls?
View SolutionSubmit Solution 4486 views
 1 answers
 0 votes

A train is moving from station A to station B at 15 mph. Another train is moving in the opposite direction from station B to A at a speed of 20mph. A vulture is flying from Station A to station B at 25 mph. When the vulture reaches at the train moving from Station B to A, it starts flying back and flies at the same speed till it reaches the train moving from station A to B and starts flying in the reverse direction again. The vulture keeps flying to and fro till both the trains collide with each other.
What is the total distance that is traveled by the vulture?
View SolutionSubmit Solution 4002 views
 1 answers
 0 votes

You are a king of an empire. You have a servant working in your palace. He works all the seven days and you only pay him in the form of gold bar. You must pay the worker for his work every day at the end of the day.
If you are only able to make two breaks in the gold bar, how will you pay the servant if the servant works for the equal time every day and thus equal amount must be paid at the end of the day?
View SolutionSubmit Solution 4631 views
 1 answers
 0 votes

There is an equilateral triangle and three bugs are sitting on the three corners of the triangle. Each of the bugs picks up a random direction and starts walking along the edge of the equilateral triangle. What is the probability that none of the bugs crash into each other?
View SolutionSubmit Solution 4725 views
 1 answers
 0 votes
More puzzles to try
Fariha’s Game
Fariha invented a game! In that game, Fariha kept 5 plates on a circular dining table! The plates were marked ...Read More »2nd smallest number puzzle
There is 38 numbers. What is the least number of comparison needed to find the 2nd smallest out of them?Read More »Ring without hands riddle
I have a ring, but no hands. I used to be plugged into the wall but now I follow you ...Read More »Can you find out the missing number in the grid?
Can you find out the missing number in the grid?Read More »A Boy and his friend age riddle
A man is as old as his friend will be when the man is twice the age that the friend ...Read More »Why he fired his guard
A very important man is about to take a trip to Iceland. He is awoken in the middle of the ...Read More »Woman Survival riddle
A woman lives alone in a farmhouse. Two prison escapees intend to kill whoever they see in the farmhouse that ...Read More »How many were going to St. Ives?
On my way to St. Ives I saw a man with 7 wives. Each wife had 7 sacks. Each sack ...Read More »The missing penny
Here is an ancient puzzle that has always perplexed some people. Two market women were selling their apples, one at three ...Read More »Do the straight horizontal gray lines look curvy to you?
Do the straight horizontal gray lines look curvy to you? Hold up a piece of paper to prove that they ...Read More »Lion, Goat and Grass Puzzle
A Man wants to bring a Lion, a goat, and Grass across the river. The boat is tiny and can ...Read More »Picking the larger of two cards
Someone picks, at their will, two cards from a deck of cards. The cards have different numbers, so one is ...Read More »Rope way riddle
You are standing on the top one of the two solid metal pillars. They are both exactly one hundred meter ...Read More »What is the fourdigit number?
What is the fourdigit number in which the first digit is onethird the second, the third is the sum of ...Read More »Water kills me
I am not alive, but I grow; I do not have lungs, but I need air; I do not have ...Read More »Guess the name of forth child puzzle
Mary’s mum has four children. The first child is called April. The second May. The third June. What is the ...Read More »Book Numbering Riddle
I am compiling the Puzzlefry world almanac and it now contains lots of pages. I know that it takes 121 ...Read More »Rings of marriage riddle
What are the three rings of marriage ?Read More »Table with four coins
A square table has a coin at each corner. Design an execution sequence, each of whose steps consists of one ...Read More »At first glance, guess which color ants are the most numerous??