Why is a river so rich ?

If you drop me I’m sure to crack, but give me a smile and I’ll always smile back. What am I?

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?

What goes up but never comes down?

You can hear me, but you can't touch or see me.

What am I?

This is a picture puzzle. You have to guess the name of the movie that can be related to the picture.

Replace the question mark with the correct number.

2 + 2= 4
3 + 3= 18
4 + 4= 48
5 + 5= ?

Manish and Manoj play 5 games of chess.
Both Manish and Manoj win the exact same number of games. There is no tie at all.

How?

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 maths symbol is hidden in the below Bar Graph. Can you decipher it?