why number 8549176320 is one of a kind?

You throw me out when you want to use me and you take me in when you don't want to use me.

Who Am I?

What am I?

I am written with two letters.
I said with the one.
I usually am seen with the two.

Who am I?

You can find some missing letters in the picture. By placing two particular letters in the spaces, you can form a nine lettered word beginning from one of the corners and going clockwise direction to the middle. Can you find out the letters and the word?

Kareena is older than Katrina and younger than Karishma. Isabelle is younger than Bipasha and Karishma. Bipasha is older than Karishma. If Kareena and Isabelle are the same age, who's the youngest?

Can you count the number of matches in the picture below ?

I have a head like a cat and feet like a cat, but I am not a cat. What am I?

There are two guys standing face to face in a room. On a wall, there is a clock. One of those is a prophet. He tells the other guy that he will be stabbed in the back in five minutes.

Shocked to hear that, the other guy stares at the clock. Just after the five minutes, he is stabbed on the back. Can you tell what happened?

What has many teeth, but cannot bite?