What is the coolest letter in the alphabet?

Which alphabet letter is a question?

If an earthquake is 1 point higher on the Richter Scale than another earthquake which is actually 10 times stronger, how much stronger would an earthquake be if it was just half a point higher on the Richter scale?

What begins with T, ends with T, and has T in it?

In a fruit store, there was a unique weighing machine that was made to weigh only cherries and strawberries as they were priced the same.

Other fruits like watermelons or mango had different machines as they were expensive.

A man successfully buys watermelons at the price of cherries. How?

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?

I throw two dice simultaneously.

What is the probability of getting a sum as 9 of the two numbers shown?

Find The Next Number in this series.
1, 2, 6, 42, 1806 ?

I know a country, If you remove the last alphabet of its name, it will become a part of your body. Do you name it?

Name one eight-letter word with 'kst' in the middle, 'in' the beginning, 'and' at the end.?