A Scientist was fifty years old in the year 2000 but he was forty years old in the year 2010. How can this be possible?

PS: It has a logical answer.

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

A man is found unconscious in front of a store at two in the morning. His head is bleeding and there’s a brick laying next to him. When the police arrive, they carry the man to jail. Why did they arrest him?

You find yourself in a strange place guarded by two guards.One of the guard always say truth while other always lies.You don't know the identity of the two.You can ask only one question to go out from there. What should you ask?

The cream is heavier than Milk. True or False?

The measurement of time, That can't be found on a clock, But can be looked upon on a map.

Who is He ?

What can run but never walks, has a mouth but never talks, has a head but never weeps, has a bed but never sleeps?

Can you convert the number zero(0) into a positive number using just one mathematical operator ?

They came out at night, without being called.
They lost at day, without being stolen.
Who are they?

What runs around the whole yard without moving?