Can you replace the question mark with the correct number in the below table sequence?

Teacher ask the student

'Why are you standing on that chair in music class ?'.

what did student replied ?

I don't get anymore wetter, no matter how much rain falls on me.

What does this rebus photo means?

It spends most of its day eating white, but when it’s quick enough, it gets to eat fruit and sometimes some blue things. It’s in a dark room, where the walls are blue, it runs from a ghost that roams the halls and haunts it all the time. What is it?

Joseph buys three kinds of chocolates for 100 rupees. The first one is priced at 5 rupees, second one at 3 rupees and third one at 0.5 rupees.

If he bought 100 chocolates in total, how many pieces do you think he bought each chocolate?

A man is found hanging dead from the ceiling of a room. The room’s dimensions are 15 x 15 x 15. The man is only 6ft tall and the rope was only 2ft long. There are no windows and only one door to the room. The door is bolted shut from the inside, and a puddle of water is under the man. How did he kill himself?

Solve the rebus riddle in the picture below.

When I get multiplied by any number, the sum of the figures in the product is always me. What am I?

Can you convert the number zero(0) into a positive number using just one mathematical operator ?