81 x 9 = 801. What must you do to make the this equation true?

A seven-year-old kid challenged his classmates that he can make the number one disappear by adding something to it.

How can he do that?

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

What country can make you shiver?

Why is a river so rich ?

It has horns but can’t beep. It is like to bleat but It is not a sheep. What is it?

What is the coolest letter in the alphabet?

I can turn polar bears white.
I can make anyone dance.
I can make everyone cry
I can make your hands clap
I can make you thin.
I can make you smile.
I can make you smile

Can you guess the riddle?

What do you call a fish without an eye?

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?