It belongs to you, but other people use it more than you do. What is it?

You find yourself in a strange place guarded by two guards.One of the guard always say truth while other always lies.You don't know the identity of the two.You can ask only one question to go out from there. What should you ask?

Can you find the hidden animal in the picture below?

A detective visits his friend John just to discover that John's neighbour Dr Jacob was murdered. Dr Jacob, who is a mathematician wrote the murderer's name in a code word "Hcqtfz". There were five suspects
1. Ajit
2. Pankaj
3. Ganpat
4. Deenu
5. Hariya

The Detective was instantly able to find the murderer.
Can you?

Consider all the numbers between 1 and 1 million. Among all these numbers, there is something very special about the number 8 and the number 2202. What is it?

Find The Next Number in this series.
1, 2, 6, 42, 1806 ?

The person who makes it has no need for it; the person who buys it has no use for it. The person who uses it can neither see nor feel it. What is it?

What does the following represent?

N N N N N N N

A A A A A A A

C C C C C C C

How many words can a quill made with the feather of a pigeon write with a 100ml bottle of black ink?

How many pluses should we put between the digits of 987654321 to get a total of 99, and where?