What does does this rebus picture means ?

Why is Saturday stronger than Monday?

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

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?

What number when divided in half becomes zero?

I know a country, If you remove the last alphabet of its name, it will become a part of your body. Do you name it?

John went to buy some expensive, foreign chocolates. He only had Rs 100 with him. When he reached the shop, he got out and know that on those chocolates, there was a 15% import duty and 5% VAT.

How much worth chocolate should he buy so that he can accommodate it in Rs 100?

Many have heard it, but nobody has ever seen it, and it will not speak back until spoken to. What is it?

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?

Can you count the number of seconds in a year?

Clue: You need to bother about calculation.