Why do people go to bed?

A little girl goes to the store and buys one dozen eggs. As she is going home, all but three break. How many eggs are left unbroken?

The day after tomorrow will be three days before Tuesday. Can you find out what is today?

What time is it when an elephant sits on a fence?

Pronounced as one letter,
And written with three,
Two letters there are,
And two only in me.
I am double, I am single,
I am black blue and grey,
I am read from both ends,
And the same either way.

Can you convert the number zero(0) into a positive number using just one mathematical operator ?

Which is the smallest number that you can write using all the vowels exactly once?

In two decks of cards, what is the least amount of cards you must take to be *guaranteed* at least one four-of-a-kind?

What number comes next in this sequence:
7 8 5 5 3 4 4 _

The captain of a ship is telling you an interesting story and then poses a question. He says, “I have travelled the oceans far and wide. One time, two of my sailors were standing on opposite sides of the ship. One was looking west and the other one east. And at the same time, they could see each other clearly. Can you tell me how that was possible?”