If eleven plus two equals one, what does nine plus five equal?

Can you tell a 3D object that has just two surfaces?

Usually, a boxing match consists of twelve rounds. In a particular friendly match between two heavyweights, the match was finished in the ninth round itself as one of the boxers knocked out the other one.

But, in that fight, no man threw even a single punch.

How can this be possible?

Two in a corner, one in a room, zero in a house, but one in a shelter. What is it?

I have a mouth but I don't eat.
I have a bank but have no money.
I have a bed but i dont sleep.
I wave but have no hands.

Who Am I ?

What country can make you shiver?

How is a fly different from a mosquito?

Can you write down eight eights so that they add up to one thousand?

Can you solve the rebus below?

You have 10 balls with you. A friend of yours out of nowhere asks you to place those ten balls in five lines such that each of the lines has exactly 4 balls on them. He needs to check your intelligence. Prove him by doing the task.