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 ?

What is more useful when it is broken?

Which is the correct shadow of the bird?

Solve the mathematical equation in the picture below.

The more of this there is, the less you see. What is it?

Transform the word THINK into BRAIN while changing only one letter at a time in a manner that each of the word in the process is a real word!!!

Can you find a seven digit number which describes itself. The first digit is the number of zeros in the number. The second digit is the number of ones in the number, etc. For example, in the number 21200, there are 2 zeros, 1 one, 2 twos, 0 threes and 0 fours.

He loves to dance, twist and prance, he shakes his tail, and as a way he sails, wingless he flies into the sky. What is he?

You are given four tennis balls and asked to arrange those balls in a manner that the distance between each one of them is exactly equal. How will you do it?