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 this riddle by finding the odd one out from the rest.

By removing one matchstick and adding one matchstick, can you convert the word "ZOO" to an animal name?

A prisoner is told: "If you tell a lie, we will hang you and if you tell the truth, we will shoot you." What did the prisoner say to save himself?

Which three-digit number, made of consecutive digits, like 567, is 2 less than a cube and 2 more than a square?

What does man love more than life, and hate more than death or mortal strife; that which satisfied men want; the poor have, and the rich require; the miser spends, the spendthrift saves, and all men carry to their graves?

Until it is measured, not known. Yet how you miss it when it has gone. What is it?

A man lives on the fifteenth floor of an apartment building. Every morning he takes the elevator down to the lobby and leaves the building. In the evening, he gets into the elevator, and, if there is someone else in the elevator, or if it was raining that day, he goes back to his floor directly. Otherwise, he goes to the tenth floor and walks up five flights of stairs to his apartment. Can you explain why he does this?

Most people think of me as money. But when they find me in the water, they won’t get any money out of me. What am I?

Can you name any English verb that becomes its past tense by simply rearranging the alphabets ?