#math
21 riddles foundA man shows you two cards. One is completely black on both sides. The other is black on one side and white on the other. He puts t…
A grandfather clock strikes six in five seconds. How long does it take to strike twelve?
I have two coins that add up to 30 cents. One of them is not a nickel. What are the two coins?
A farmer has 17 sheep. All but nine die. How many sheep does the farmer have left?
A man offers you a bet. He flips a coin 10 times and gets heads every single time. He then bets you that the next flip will also b…
How many times can you subtract 5 from 25?
A doctor gives a patient three pills and tells him to take one every half hour. How long until all pills are taken?
An elevator has no buttons inside. People still reach every floor they want. How?
A scientist stands in a room where nothing has weight. She is on Earth, not in water. Where is she?
A man flies the same route every Monday for a year. One Monday he arrives at the airport but refuses to board even though the flig…
A man has two identical boxes. He fills one with feathers and one with lead. The box filled with feathers is heavier. How is this …
One hundred people attend a party. By midnight, zero people have left. By 1 AM, zero people have left. Yet by 2 AM only one person…
A brick weighs one kilogram plus half a brick. How much does the brick weigh?
A woman dials a wrong number and ends up saving a stranger's life. How?
A man was born in 1970 and turned 40 in 1990. How is this possible?
A man enters a completely dark room and instantly knows exactly how many people are in it. He is not psychic, there are no sounds,…
Two identical twins are on trial for the same crime. Only one is guilty. The jury cannot tell them apart. They are both acquitted.…
What gets shorter the more you add to it?
Three men check into a hotel room. The clerk says the room costs 30 dollars. Each man pays 10 dollars. Later, the clerk realizes t…
At her mother's funeral, a woman meets a man she has never seen before. She falls deeply in love with him but never gets his numbe…
A woman was born in 1990 and turned 25 years old twice. How is this possible?