Why did the Girl throw the butter out of the window?

What mathematical symbol can be put between 5 and 9, to get a number bigger than 5 and smaller than 9?

You knock a Table over in the library, and suddenly 20 eyes are looking at you.

Your job is to measure 45 minutes if you have only two cords and matches to light the cords.

1. The two cords are twisted from various materials, so their different segments can burn at different rates.
2. Each cord burns from end to end in exactly one hour.

Describe your way of measuring the 45 minutes.

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.

Prove that twice of ten is the same as twice of eleven.

Complete the table series riddle by finding the number that can replace "??".

If a wheel has 54 spokes, how many spaces are there between the spokes?

A man who was outside in the rain without an umbrella or hat didn’t get a single hair on his head wet. Why?

A man is looking at a photograph of someone. His friend asks who it is. The man replies, “Brothers and sisters, I have none. But that man’s father is my father’s son.” Who was in the photograph?