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

There is one thing that goes round the house and also inside the house but never even share a brief touch. What is it?

What has six faces, but does not wear makeup, has twenty-one eyes, but cannot see?

what does the below rebus means?

You see a boat filled with people, yet there isn’t a single person on board. How is that possible?

Different lights make me strange by changing me into different sizes. What am I?

Imagine you are in a room with no windows or doors. How will you get out?

What is the largest amount of money that you can possess in change and still if someone asks you for a dollar, you won't be able to give?

There are 20 people in an empty, square room. Each person has full sight of the entire room and everyone in it without turning his head or body, or moving in any way (other than the eyes). Where can you place an apple so that all but one person can see it?