When I got four, I have it none.
When I got two, I have it some.
When I got none, I have it all.

What is it?

There was a blind man. He had four socks in his drawer either black or white. He opened it and took out two socks. Now the probability that it was a pair of white socks is 1/2.

Can you find out the probability that he had taken out a pair of black socks ?

What is full of holes but still holds water?

How can you throw a ball as hard as you can and have it come back to you even if it doesn't hit anything there is nothing attached to it and no one else catches or throws it.

I have an eye but still cannot see.

Who am I?

Many have heard it, but nobody has ever seen it, and it will not speak back until spoken to. What is it?

Find out a multi-digit number that if multiplied by the number 9 or any of its multiplications products (i.e. 18, 27, 36, 45,..) will result in the multiplication factor repeated (n) number of times.

Can you calculate the probability of getting a sum of six when a dice is thrown twice?

Find the next number in the series?
2, 12, 36, 80, 150, 252, 392, _ ?

There is a box. The area of its top is 240 square units, the area of the front is 300 square units and the area of the end is 180 square units.

Can you calculate the dimensions of this box with the given data?