What goes up but never comes down?

If there are fifteen crows on a fence and the farmer shoots a third of them, how many crows are left?

I am soft and cuddly that soothe your heart. But, If you pick my last name I am going to tear you all apart. Who am I?

How many people must be gathered together in a room, before you can be certain that there is a greater than 50/50 chance that at least two of them have the same birthday?

Can you place six X (crosses) in below board without making three in a row in any way ?

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

Using Only Five 5's and any mathematical operator make sum as 37

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

When my father was 31 I was 8. Now he is twice as old as me. How old am I?

A person was killed at a house party. When the police arrive, there are six people present in the house who are the friends of the victim. The name of the friends is Rohit, Aman, Nick, Gagan, and Randy.

Near the dead body, they find a few numbers written with blood by the victim on the floor. The numbers are 8, 5, 4, and 11.

The police arrests one of the friends for the murder. Whom did they arrest and why?