If it took eight men ten hours to build a wall, how long would it take four men to build it?

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?

What always comes into a house through the keyhole?

81 x 9 = 801. What must you do to make the this equation true?

What has many teeth, but cannot bite?

There is an English word that can be used up to four times in a row without modifying the spelling and form a valid grammatical sentence.

Do you know what word is that?

What can jump higher than a building?

First, think of the colour of clouds. Next think the colour of snow. Last, think of the colour of the moon. Now, what do cows drink?

There are three houses in a straight row. One is red, one is blue, and one is white. The red house is left of the middle. The blue house is right of the middle. Where's the white house?

What is red and smells like blue paint?