There are 20 people in an empty, square room. Each person has full sight of the entire room and everyone in it without turning his head or body, or moving in any way (other than the eyes). Where can you place an apple so that all but one person can see it?

Which is the correct shadow of the bird?

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

How is the moon similar to a dollar?

A woman lives in a skyscraper thirty-six floors high and is served by several elevators which stop at each floor going up and down. Each morning she leaves her apartment and goes to one of the elevators. Whichever one she takes is three times more likely to be going up than down. Why?

In the picture given below, can you find out which digit will take place of the question mark?

They are three errirs in this question. Can you find them?

John left on a horse on Thursday , was gone for two days, and came back on Thursday after completing his work. How did that happen?

If eleven plus two equals one, what does nine plus five equal?

I am taken from a mine and shut up in a wooden case, from which I am never released, and yet I am used by almost every person. What am I?