Three doctors said that Bill was their brother. Bill says he has no brothers. How many brothers does Bill actually have?

Why is a river so rich ?

It can't be seen, can't be felt, can't be heard, and can't be smelt.
It lies behind stars and under hills, And empty holes it fills.
It comes first and follows after, Ends life, and kills laughter.
What is it?

Find the 8 in the below-given Image.

Most people think of me as money. But when they find me in the water, they won’t get any money out of me. What am I?

If,
9 * 8 * 7 = 65
8 * 7 * 6 = 50
7 * 6 * 5 = 37

Find
6 * 5 * 4 = ?

No one wants to have it, but if one got it, he does not want to lose it. What is It?

Count the number of lines in the image below ?

I can turn polar bears white.
I can make anyone dance.
I can make everyone cry
I can make your hands clap
I can make you thin.
I can make you smile.
I can make you smile

Can you guess the riddle?

A man dies of old age on his 25 birthday. How is this possible?