What do you call a fish without an eye?

Can you move 2 matchsticks to form four equal sized squares.

The more of this there is, the less you see. What is it?

What can jump higher than a building?

A boy was locked in a room by some robbers. All that is in the room is a piano, a calendar, and a bed. The room is locked from the outside. What does he eat, drink, and how does he escape and get out?

A father's child, a mother's child, yet no one's son.

Who am I?

A man lives on the fifteenth floor of an apartment building. Every morning he takes the elevator down to the lobby and leaves the building. In the evening, he gets into the elevator, and, if there is someone else in the elevator, or if it was raining that day, he goes back to his floor directly. Otherwise, he goes to the tenth floor and walks up five flights of stairs to his apartment. Can you explain why he does this?

Find three numbers such that When we multiply three numbers, we will get the prime numbers. The difference between the second and the first number is equal to the third and second.

Teacher ask the student

'Why are you standing on that chair in music class ?'.

what did student replied ?

Move three sticks of the spiral below to form a square.