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

Can you think of a smallest +ve number such that if we shuffle the digits of the number, the new number becomes double the original number?

What 4-letter word can be written forward, backward or upside down, and can still be read from left to right?

John has eleven friends. He has a bowl containing eleven apples. Now He wants to divide the eleven apples among his friends, in such a way that an apple should remain in his bowl.
How can He do it?

What is the next number in this matchsticks series riddle?

There are 2 people near the river and both of them want to get on the other side. The boat can only take one of them. But they got across.
How?

Which digit occurred maximum times between the number 1 and 1000?

Outside a tattoo artist's shop, there was a signboard which read 'I make tattoos on only them who do not tattoo themselves'.

Reading it what do you think, does the tattoo artist tattoo himself?

French Police inspects a room where there are no windows, no doors, no tables and is almost empty expect there is just a puddle of water. They found a dead man who obviously hung herself from the ceiling, but they are not able to figure out how this had happened.

John and Jacob entered the crime scene and easily able to solve the case.

How did the man die?

You walk into a room that contains a match, a kerosene lamp, a candle and a fireplace. What would you light first?