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?

What is common among 11, 69, and 88?

I travel all around the world but always stay in the corner. What am I?

When I got four, I have it none.
When I got two, I have it some.
When I got none, I have it all.

What is it?

It has horns but can’t beep. It is like to bleat but It is not a sheep. What is it?

How can one talk without saying a single word?

Count the number of lines in the image below ?

Using four sevens (7) and a one (1) create the number 100. Except for the five numerals, you can use the usual mathematical operations (+, -, x, :), root and brackets ()

Today is John's birthday.
A year ago, John had five candles and he lit all the candles except the one at the last.
Now he is going to light all the candles.

How old is John Today?

(He is not five today.....)

Solve the equation by replacing the alphabet with numbers.

MOM + MOM + NO = BOOK=