Replace the question mark with the correct number in the below-given picture?

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?

Find out the missing number in the picture attached:

A blonde put eyeliner on her head. Why?

Mr Red Lives in the red house.
Mr Green Lives in the greenhouse.
Mr Yellow Lives in the yellow house.

Who lives in the Whitehouse?

Prove that the below maths equation is true.

8 + 8 = 91

There are forty elephants and they have forty-fore heads. How can this be possible?

On my way to St. Ives I saw a man with 7 wives. Each wife had 7 sacks. Each sack had 7 cats. Each cat had 7 kittens. Kittens, cats, sacks, wives. How many were going to St. Ives?

What has hands, but can’t clap?

A word I know has six letters it contains, remove one letter and 12 remain. What is it?