What has no start, end, or centre?

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?

When I go in I might cause pain. I cause you to spit and ask you not to swallow. I can fill your hole. What am I?

Solve the rebus riddle in the picture below.

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

Find out the missing number in the picture attached:

Can you count the number of rectangles on a chessboard?

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

What does this rebus riddle mean?

Can You Find The Poor LOST PUPPY Hidden In The Park in 20 Seconds?