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?

Intelligence Agency need to break the vault but the problem is that they are not able to break the vault.

On the vault, a text is written as:

31 11 33 33 43 45
21 25
31 24 11 31 51 41

To Break the code Intelligence Agency brings a mathematician named Joseph.
Minutes later he deciphers the code.

Whats the code?

The captain of a ship was telling this interesting story: "We travelled the sea far and wide. At one time, two of my sailors were standing on opposite sides of the ship. One was looking west and the other one east. And at the same time, they could see each other clearly." How can that be possible?

Count the number of triangles in the given picture.

A man and a dog were going down the street. The man rode, yet walked. What was the dog’s name?

If six children and two dogs were under an umbrella, how come none of them got wet?

The product of three consecutive numbers is 7980.
Then the sum of these consecutive numbers would be?

Can you name four days which start with the letter 'T'?

John replied, when asked how old he was. In 2 years he will be twice as old as he was five years ago.' How old is he ?

When is the top of a mountain similar to a savings account?