You enter your friend's room. He is not in his room. Although you see that on the bed there are two dogs, five cats, two giraffes and three pigs. Also, a couple of chickens and ducks are flying in the room.

Calculate the number of legs standing on the floor.

Can you find a seven digit number which describes itself. The first digit is the number of zeros in the number. The second digit is the number of ones in the number, etc. For example, in the number 21200, there are 2 zeros, 1 one, 2 twos, 0 threes and 0 fours.

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

If an electric train is travelling south, then which way is the smoke going?

A certain street contains 100 buildings. They are numbered from 1 to 100. How many 9's are used in these numbers?

A seven-year-old kid challenged his classmates that he can make the number one disappear by adding something to it.

How can he do that?

Sherlock Holmes was challenged to make a pre-drawn line smaller without erasing it. He did it in fractions of seconds. How?

You walk into a room that contains a match, a kerosene lamp, a candle and a fireplace. What would you light first?

The more it dries, the wetter it becomes. Can you tell what it is?

Which country gets ill every time?