Brain Teasers (Answers in Comments)

So there's this king. Someone breaks into his wine cellar where he stores 1000 bottles of wine. This person proceeds to poison one of t...

There are 5 houses in a row, each with a different color. Their owners, each with a unique heritage, drinks a certain type of beverage, smo...

There are 100 prisoners in a jail, each in an isolated cell. In the lobby of the jail is a room with a light and a lightbulb (starts in the ...

There are one million numbered lockers in a row. They all start out closed. On your first pass, you flip every locker, so each one is open. ...

There are two trains traveling 60 mph towards each other. When they are 120 miles apart, a fly leaves one train heading towards the other at...

You are in a completely dark room with a deck of 52 cards. 12 of the cards are face up, but they are randomly distributed throughout the dec...

You have 25 horses. You need to find out which 3 are the fastest. Only 5 horses can race at a time. You are only given the order in which th...

You are on a game show. You have 50 Red and 50 Green balls and 2 urns. You are free to distribute the balls among the 2 urns anyway you want...

You have one block of gold, weighing 7 pounds. You also have a worker, who is going to work for you for 7 days. You need to pay him 1 pound ...

A king has fifty prisoners. He decides to play a game to give them a chance to win their freedom. The next day, he will line up the prisoner...