What is a word made up of 4 letters, yet is also made up of 3. Sometimes is written with 9 letters, and then with 4. Rarely consists of 6, and never is written with 5.

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 does a man do only once in his lifetime, but women do once a year after they are 29?

Why is Saturday stronger than Monday?

What number does the below three word/phrase identify and why?
1. Deck
2. Year
3. Singing in the Rain

On one occasion, A Boy collects 71 rupees in form of 20 paise and 25 paise. He collects a total of 324 coins.

Can you tell me how many 20-paisa and 25-paisa he got?

It has a long neck, A name of a bird, Feeds on cargo of ships, It's not alive,

What is it?

A new Engineering building containing 100 offices had just been completed. John was hired to paint the numbers 1 to 100 on the doors. How many times will John have to paint the number nine (9)?

Your mother’s brother’s only brother-in-law is asleep on your couch. Who is asleep on your couch?

John said, "If yesterday was tomorrow, today would be Friday."

When did John make this statement?