The best riddles. Anywhere.

Famous Riddles

These are some of the most famous riddles in the world. They've been passed down for generations, and are renowned for their ingenuity and universal appeal.

You are on a gameshow and the host shows you three doors. Behind one door is a suitcase with \$1 million in it, and behind the other two doors are sacks of coal. The host tells you to choose a door, ...
You are walking down a path when you come to two doors. Opening one of the doors will lead you to a life of prosperity and happiness, while opening the other door will lead to a life of misery and ...
A man goes into an ocean-side restaurant and orders the albatross dish. He takes a single bite when the food arrives, puts down his fork, pulls out a gun, and shoots himself. Why does he do this?
A farmer is travelling with a fox, a sheep and a small sack of hay. He comes to a river with a small boat in it. The boat can only support the farmer and one other animal/item. If the farmer leaves ...
Three people check into a hotel room. The bill is \$30 so they each pay \$10. After they go to the room, the hotel's cashier realizes that the bill should have only been \$25. So he gives \$5 to the ...
What is the least number of people that need to be in a room such that there is greater than a 50% chance that at least two of the people have the same birthday?
The Knight's Tour is a famous chess problem, in which a knight starts on the top-left square of an ordinary chessboard and then makes 63 moves, landing on every square of the chessboard exactly once ...
Einstein said that only 2% of the world could solve this problem. There are 5 houses in 5 different colors. In each house lives a person with a different nationality. The 5 owners drink a certain ...
In chess, queens can move horizontally, vertically, or diagonally, as far as they like, as shown in the picture. We say that a queen can "attack" another piece if it can move into the other piece on ...
Look at the 9 dots in this image. Can you draw 4 straight lines, without picking up your pen, that go through all 9 dots?
A monk leaves at sunrise and walks on a path from the front door of his monastery to the top of a nearby mountain. He arrives at the mountain summit exactly at sundown. The next day, he rises again ...
How can you place the numbers 1 through 9 in a 3x3 grid such that every row, column, and the two diagonals all add up to 15?
There is a small town in the midwest with exactly 2 barbershops, one on each side of town. The barbershop on the west side of town is pristine. Its floors are spotless, the windows are always ...
This is an old classic: As I was going to St. Ives I met a man with seven wives The seven wives had seven sacks The seven sacks had seven cats The seven cats had seven kits Kits, cats, sacks and ...
You have two jugs, one that holds exactly 3 gallons, and one that holds exactly 5 gallons. Using just these two jugs and a fire hose, how can you measure out exactly 4 gallons of water?