Solve the following series:
AZ, GT, MN, __, YB

If 1+9+8=1, what is 2+8+9?

This puzzle is for Harry Potter fans. Do you know why Tom Riddle is called Lord Voldemort?

An evil man kidnapped someone and made them take one of two pills. One was harmless, but the other was poisonous. Whichever pill the victim took, the kidnapper took the other one. The victim took their pill with water and died. The kidnapper survived. How did the kidnapper get the harmless pill?

What brings you down but never up?

Sherlock breaks into a crime scene. The victim is the owner who is slumped dead on a chair and have a bullet hole in his head. A gun lies on the floor and a cassette recorder is found on the table. On pressing the play button, Sherlock hears the message 'I have committed sins in my life and now I offer my soul to the great Lord' and followed a gunshot Sherlock smiles and informed the police that's its a murder.

Why did he think so?

Which English verb becomes past tense just by rearranging the letters?

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

There are a number of books on a shelf. If one book is the 4th from the left and 6th from the right, how many books are on the shelf?

I’m light as a feather, yet the strongest person can’t hold me for five minutes. What am I?