How can a man go eight days without sleep?

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?

When it's bad luck to meet a black cat?

What is 3/7 chicken, 2/3 cat and 2/4 goat?

Prove that twice of ten is the same as twice of eleven.

Who are the happiest people in IPL match?

What is the coolest letter in the alphabet?

You are stuck on an island where you have nothing. You find four pieces of paper somewhere on the island. What will be your strategy to escape from the island safely?

PS: No other resource is available to you on the island, neither can you build anything.

What type of tree can I carry in my hand?

What can you hold in your right hand, but never in your left hand?