What will you call your mother's brother's brother-in-law?

I can write cow in 13 letters.

Can You?

What does the below image rebus riddle means ?

To attend world science seminar, A famous chemist from Mexico visit
London. In the lab, the scientist was killed and his six assistants were under suspicion of killing the chemist.
Name of six assistants: Austin, Wayne, Dege, Oscaru, Lingard, and Rojo.
He left a note "76-20-44 79-16-22-7"

A local detective Jack was called to solve the case,

After reading the note, Jack instantly asked the police to arrest the murderers.

Who are the murderers?

What country can make you shiver?

How can a man go eight days without sleep?

What came first, the chicken or the egg?

Transform the word THINK into BRAIN while changing only one letter at a time in a manner that each of the word in the process is a real word!!!

Here is a mathematical expression that also secretly tells a movie name. What movie is that?

If you’ve got me, you want to share me; if you share me, you haven’t kept me. What am I?