What is the fastest way to double your money?

Find three numbers such that

* When we multiply three numbers, we will get the prime numbers.
* The difference between the second and the first number is equal to the third and second.

Which tank will fill first?

Which is heavier: a ton of bricks or a ton of feathers?

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

Krish is 45 years old and his mother Crishtina is 73 years old.

Can you find out how many years ago, his mother was three times his age?

I have lakes with no water, mountains with no stone and cities with no buildings. What am I?

A clock loses 10 minutes each hour. If the clock is set correctly at noon, what time is it when it reads 3 PM?

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

Can you start the fire using two pieces of wood?