A boy and a girl are sitting on the porch.
"I'm a boy," says the child with black hair.
"I'm a girl," says the child with red hair.
If at least one of them is lying, who is which?

What can go up a chimney down, but can’t go down a chimney up?

I add 5 to 9 and get 2. The answer is correct, so what am I?

John buys rice at Rs.60/kg from Britain and then sells them at Rs.5/kg in India. As a result of this, he becomes a millionaire. How come?

What will you call your mother's brother's brother-in-law?

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

What goes through cities and fields, but never moves?

I have a clock(12-hour format) and both the needles of the clock overlap at 12:00.
After how much time, they will overlap again?

What mathematical symbol can be put between 5 and 9, to get a number bigger than 5 and smaller than 9?

Here is what you have to do. You have to throw a ball as hard as you can but it must return back to you even if it does not bounce at anything. Also, you have nothing attached to the ball. There is no one on the other end to catch that ball and throw it back at you.

How will you do it?