You want to boil a two-minute egg. If you only have a three-minute timer (hourglass), a four-minute timer and a five-minute timer, how can you boil the egg for only two minutes?

If I remove one from eleven it becomes Ten and if I remove one from nine also becomes Ten. How?

Which number should replace the question mark?

Can you count the number of matches in the picture below ?

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

What has a bottom at the top?

When I asked a girl's name she told me her name is the date '07/09/2001'.

I thought for a few seconds and then I got her name. Do you?

How can you make the following equation true by drawing only one straight line: 5+5+5=550 ?

Double it and multiply it by 4. Then divide it by 8 and you’ll have it once more. What number is it?

Imagine a box with two cogwheels, one big with 24 teeth and one small with 8 teeth. The big one is firmly attached to the center of the box which means it does not turn or move while the small one rotates around the big one.

How many times do you think that the smaller wheel will turn compared to the box when it turns once around the big one?