What does this Rebus Picture mean?

What can jump higher than a building?

I am taken from a mine and shut up in a wooden case, from which I am never released, and yet I am used by almost every person. What am I?

Which point will the car reach to go out?

There is a box full of marbles,
all but two are blue,
all but two are green,
and all but two are red.

How many marbles are in the box?

Can you replace the question mark with the correct number?

What is the largest amount of money that you can possess in change and still if someone asks you for a dollar, you won't be able to give?

Solve the equation by replacing the alphabet with numbers.

MOM + MOM + NO = BOOK=

A chess tournament is taking place on knock-out terms (the one who loses the match is out of the game).
(a) If 10 matches are played in total, how many players participated?
(b) If 20 players took part in the tournament, how many matches were played?

Which digit occurred maximum times between the number 1 and 1000?