No one wants to have it, but if one got it, he does not want to lose it. What is It?

I am not alive, but I grow; I don't have lungs, but I need air; I don't have a mouth, but water kills me. What am I?

In The 1st month of this year(the year 2013), I noticed that the date 13-1-13 (13 January 2013) is special.

This date is special as:

Date * Month = Year.

Can you figure out which year of this century has a maximum number of such dates?

How can you take 2 from 5 and leave 4?

If you're 8 feet away from a door and with each move you advance half the distance to the door. How many moves will it take to reach the door?

Two boys were admitted to a school. When the headmaster asks them about their parents, they tell him that they have same parents (father and mother). On further inquiry, it turns out that they both share the same date for their birthday.

"Are you twins," ask the headmaster.
"No," replies the boys.

Is it possible?

What kind of band never plays music?

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?

A Doctor always sneezes before the rain. Doctor sneezes, Will it rain?

It walks on 4 when its young, walks on 2 when it's older, and walks on 3 when its very old?