Which wheel of car does not rotate when you turn your car right?

The person who makes it has no need for it. He who purchases it does not use it. The person who does use it does not know they are. What is it?

What Deficiency does the below rebus represent?

VIT_MIN

I am the fastest animal but cannot climb the tree. What am I?

What part of the chicken has the most feathers?

If you read clockwise, you can form a word by inserting three missing letters in the picture given below. Can you do it?

What goes through cities and fields, but never moves?

John is found dead in a bare field. Nobody killed John,
John did not commit suicide.

Inspector Jacob found a bag just a few meters away from John which could save his life. What was in the bag?

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?

In the addition below, all digits have been replaced by letters. Equal letters represent equal digits and different letters represent different digits.
ABCABA
BBDCAA
ABEABB
ABDBAA
------- +
AAFGBDH
What does the complete addition look like in digits?