A man in a bar asks the bartender for a glass of water. Instead the bartender pulls a gun from below the table and points it at the man. The man thanks the bartender and leaves the bar. What happened? (Give the most logical explanation as to why this behavior makes sense). - via Subhashini
Monthly Archives for December, 2013
Two teenage boys play the following game: They are in 2 different cars, and they are about to make a head on collision. The only way they survive is if one of them swerves in his lane and avoids the head-on collision. However, if one of them swerves and the other person goes straight, the boy who goes straight shouts "chicken" at the boy who … Continue reading the story "A game of chicken - Correlated equilibrium"
A coin is dropped in a bottle, and then the bottle is sealed with a cork. How will you get the coin out without removing the cork or breaking the bottle? - via Good riddles now
A cup partially filled with water is placed on a circular table and the table is rotated about it's axis at a constant speed. If the speed is too high, one of the following will happen: 1) The cup slides off the table. 2) The cup tips and falls. 3) The water in the cup splashes out. Of course, the speed of rotation, the size and shape of the … Continue reading the story "A cup on a disk"
Suppose is a continuous function such that and for all . Show that for all . - via Jiang Tao.
Arrange six identical solid cylinders in 3-D space such that every cylinder touches every other cylinder. - via Cheuk Ting Li
Here is a tricky probability puzzle. A crime has been committed. A suspect has a blood type that matches the blood in the crime scene. The probability that an innocent person's blood matches the blood at the crime scene is 1/1000. What is the probability that the suspect is innocent? It's tricky to answer because I haven't specified all the variables needed to solve this puzzle. - … Continue reading the story "A court case"
Consider the grid below. - You have to complete the grid such that every row and column contains the numbers 1 to 5. - Each row and column contains each number only once. - However, you have to follow the rules around the outside, which tell you how many skyscrapers you can see. - You can't see a shorter skyscraper behind a taller one. - The puzzles can be quite … Continue reading the story "Skyscraper puzzle - medium"
3 men, a big monkey and 2 small monkeys want to cross the river. They have a 2-seater boat (only 2 people at a time). Only a human or the big monkey can row the boat. At all times, the number of humans on either side of the river must be greater than or equal to the number of monkeys, otherwise humans will be eaten … Continue reading the story "Humans and Monkeys"