What is the coolest letter in the alphabet?

What can go up a chimney down, but can’t go down a chimney up?

What do you call a fish without an eye?

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

What kind of storm is always in a rush?

Who always enjoys poor health?

What type of tree can I carry in my hand?

Forwards I am heavy, backward I am not. What am I?

I am five letter word that is under you.
If you remove my 1st letter, then I am over you.
If you remove my 1st and 2nd letters then I am all around you.

Who am I?

How can you drop a raw egg from a height onto a concrete floor without cracking it?