A rubber ball keeps on bouncing back to 2/3 of the height from which it is dropped. Can you calculate the fraction of its original height that the ball will bounce after it is dropped and it has bounced four times without any hindrance ?

There are two guys standing face to face in a room. On a wall, there is a clock. One of those is a prophet. He tells the other guy that he will be stabbed in the back in five minutes.

Shocked to hear that, the other guy stares at the clock. Just after the five minutes, he is stabbed on the back. Can you tell what happened?

There is a box full of marbles,
all but two are blue,
all but two are green,
and all but two are red.

How many marbles are in the box?

A man who was outside in the rain without an umbrella or hat didn’t get a single hair on his head wet. Why?

Who can jump higher than a Mountain?

In a jungle where there are no street lights or any other artificial source of lights, I notice a black snake crossing the road.
How did I get sight of the snake?

A bomb exploded in a room full of married couples and no one died. How?

What is in seasons, seconds, centuries and minutes but not in decades, years or days?

Things are just as they seem, right? Well, check again.
Can you count the number of tigers in this picture ?

What is the riddle which can be asked all day with a different correct answer each time.