using four eights (8) and a one (1) and one mathematical symbol , create the number 100

Replace the question mark with the correct number below.

Why did the Girl throw the butter out of the window?

I have feet, but no legs. Which animal Am I?

Can you decipher the following common phrase?

T M C
A U O
H S M
W T E

Name a key which is hardest to turn.

I have one of the three numbers: 1, 2, or 3 in my mind. I speak only truth. You can ask me just one question for which I will only reply in yes or no or don't know. What question will you ask from me so that you are able to know the number?

Can you spot what's wrong with the following sentence?

PETER WAS ANGRY AT
HIMSELF BECAUSE HE
ACCIDENTALLY LEFT THE
THE KEYS TO HIS CAR
AT HIS FRIEND'S HOUSE.

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?

Where do you go to learn how to make ice cream?