What time is it when an elephant sits on a fence?

What is harder to catch the faster you run?

The measurement of time, That can't be found on a clock, But can be looked upon on a map.

Who is He ?

What do you call a fish without an eye?

If you had a pizza with crust thickness 'a' and radius 'z', what's the volume of the pizza?

It begins where the time ends.
Its second is an expression of surprise.
Its third is a question.
Its fourth is urinate.
It ends with a drink.

Which country it is?

If two's company, and three's a crowd, then whats four and five ?

Why is it very easy to weigh a fish?

Buy me, smell me or deliver me, I do not change.

Who am I?

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?