I am a type of room you cannot enter or leave. Raised from the ground below, I could be poisonous or a delicious treat. What am I?

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

Why do Chinese men eat more rice than Japanese men do ?

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

It begins where the time ends.
Its second is an expression of surprise.
Its third is a question.
Its fourth is urinate.
It ends with a drink.

Which country it is?

Why is 6 afraid of 7?

What is the fastest way to double your money?

I am quite hot but become too cold if you remove the first two letters. What am I?

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?

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