Replace the question mark with the correct number in below Picture:

Complete the table series riddle by finding the number that can replace "??".

The horse jumps over the king.
Strangely there is absolutely no scratch on him.

Can anyone explain, how is this possible?

In a university, a professor gave a set of three problems to the three brilliant students of his class. See the image for the questions.

If six children and two dogs were under an umbrella, how come none of them got wet?

Which three-digit number, made of consecutive digits, like 567, is 2 less than a cube and 2 more than a square?

The owner of a popular clothing store comes up with his own method of pricing items. A vest costs $8, socks cost $10, a tie costs $6, and a blouse costs $12. Using the owner’s method, how much would a pair of underwear cost?

The first person saw the bridge step on it and crossed,
the second person saw the bridge did not step on it but crossed,
the third person did not see the bridge did not step on it but crossed.
Who are these people?

How can you throw a ball as hard as you can and have it come back to you even if it doesn't hit anything there is nothing attached to it and no one else catches or throws it.

A number can be multiplied by multiple of nine
i.e 9 18 27 36 45 ...

and the resulting number consist of only one digit.

Can you identify the number ?