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?

I have teeth but i don't bite. Who Am I ?

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

Can you think of a smallest +ve number such that if we shuffle the digits of the number, the new number becomes double the original number?

Today, I celebrated my 32nd birthday but I was born in 1972.
How is this possible?

The Puzzle: A girl, a boy, and a dog start walking down a road.

They start at the same time, from the same point, in the same direction.

The boy walks at 5 km/h, the girl at 6 km/h.

The dog runs from boy to girl and back again with a constant speed of 10 km/h. The dog does not slow down on the turn.
How far does the dog travel in 1 hour?

Your job is to measure 45 minutes if you have only two cords and matches to light the cords.

1. The two cords are twisted from various materials, so their different segments can burn at different rates.
2. Each cord burns from end to end in exactly one hour.

Describe your way of measuring the 45 minutes.

If "P" means "-", "Q" means "/", "R" means "+", and "S" means "*" then find the value of the following:

21 Q 7 R 9 S 10 P 13

We know that the number 7 is the prime followed by a cube. Which next number is also a prime followed by a cube?

Take away my first letter, then take away my second letter. Then take away the rest of my letters, yet I remain the same. What am I?