They are the five precious gems of an everyday sort and all can be found on a Tennis Court. Who are they?

I cannot talk, but I always reply when spoken to. What am I?

The barber of Town shaves all men living in the town. No man living in the town is allowed to shave himself. The barber lives in that town. Who then shaves the barber of the town?

A man who was outside in the rain without an umbrella or hat didn’t get a single hair on his head wet. Why?

What is the coolest letter in the alphabet?

There was once a college that offered a class on probability applied to the real world. The class was relatively easy, but there was a catch. There were no homework assignments or tests, but there was a final exam that would have only one question on it. When everyone received the test paper it was a blank sheet of paper with a solitary question on it: 'What is the risk?'.Most students were able to pass, but only one student received 100% for the class! Even stranger was that he only wrote down one word!
What did he write?

Women do it once a year after they turn 19 but men get to do it only once in a lifetime. What is it?

I have branches, but no fruit, trunk or leaves. What am I?

Who always enjoys poor health?

Make a sentence consisting of three words that have the whole alphabet.