What four weights can be used to balance from 1 to 30 pounds?

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

If your uncle’s sister is not your aunt, what relation is she to you?

What can go up a chimney down, but can’t go down a chimney up?

You have an empty wine bottle with a cork that has been secured at the top in a normal way. There is a metal ring inside the bottle that is suspended by a string.

How can you make the metal ring drop to the bottom if you are not allowed to touch anything - not the bottle, not the cork, not the thread and not the ring?

Guess the hidden movie name?

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 has no start, end, or centre?

What is so fragile that saying its name breaks it?

The centre of the third figure is empty. What digit should fit inside?