The centre of the third figure is empty. What digit should fit inside?

What will you call your mother's brother's brother-in-law?

Can you solve this amazing hard number series problem?
7, 8, 10, 12, 16, 18 ?

A sea diver is a real show-off. He showed everyone that he can hold his breath underwater for 15 minutes.

I went to the diver and told him that I can be underwater for double the time i.e 30 minutes.
He responded that he will give me 100$ if I would be able to do it. I won 100$.

What did I do?

An infinite number of mathematicians are standing behind a bar. The first asks the barman for half a pint of beer, the second for a quarter pint, the third an eighth, and so on. How many pints of beer will the barman need to fulfill all mathematicians' wishes?

Can you count the number of quadrilaterals in the picture below?

How could a baby fall out of a twenty-story building onto the ground and live?

Solve the puzzle by telling what does below picture means.

Find The Odd One Out

1. FLOW
2. SNIP
3. TRAP
4. DRAW
5. BACK

I don't get anymore wetter, no matter how much rain falls on me.