What Adam and Eve do not have but the rest of the people have?

If 5 cats catch 5 mice in 5 minutes, how long will it take one cat to catch a mouse?

How many people must be gathered together in a room, before you can be certain that there is a greater than 50/50 chance that at least two of them have the same birthday?

Forwards I am heavy, backward I am not. What am I?

A large container is kept in open under the rain. Every passing hour, the water collected inside the container becomes double what it was.

In ten hours, the container is filled completely. Can you calculate how long would it have taken to be filled in half?

You have a square. What you have to do is cut and reassemble the square such that you create a Red Cross sign that has the same volume as that of the square.

The Little ant seems to be always confused. Do you know why?

I am a prime number.
The double of myself is equal to the square of me.

which number am I?

There is a unique number which when multiplied by any number from 1 to 6, we will get the new number that contains the same digits only.

Can you find that number?

What two things can you never eat for breakfast?