I’m tall when I’m young, and I’m short when I’m old. What am I?

Intelligence Agency need to break the vault but the problem is that they are not able to break the vault.

On the vault, a text is written as:

31 11 33 33 43 45
21 25
31 24 11 31 51 41

To Break the code Intelligence Agency brings a mathematician named Joseph.
Minutes later he deciphers the code.

Whats the code?

Solve the equation by replacing the alphabet with numbers.

MOM + MOM + NO = BOOK=

They are three errirs in this question. Can you find them?

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

Take away my first letter, then take away my second letter. Then take away the rest of my letters, yet I remain the same. What am I?

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

A maths symbol is hidden in the below Bar Graph. Can you decipher it?

There are six people in a family namely M, N, O, P, Q and R.

R and O are brother and sister.

N is the brother of Q's husband.
P is the father of M and grandfather of R.

How many male members are in the family?

I am the beginning of the end, and the end of time and space. I am essential to creation, and I surround every place. What am I?