A word I know,
Six letters contain,
Subtract just one,
And twelve is what remains.

What is the difference between a jeweller and a jailer?

What is the coolest letter in the alphabet?

What kind of tree can you carry in your hand?

Name a key which is hardest to turn.

What number when divided in half becomes zero?

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?

What has one eye, but can’t see?

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

Most people think of me as money. But when they find me in the water, they won’t get any money out of me. What am I?