Buy me, smell me or deliver me, I do not change.

Who am I?

I am a seven-letter word but if you remove four of my letters I will have one left. What word am I?

Bopanna was working on a murder case when he received a message about the location of the murder weapon.
The message was encrypted as below.

"deb mitciv eht edisni neddih si nopaew redrum ehT"

Tell me the location of the murder weapon.

What number does the below three word/phrase identify and why?
1. Deck
2. Year
3. Singing in the Rain

A lion and its tamer are standing inside a cage that measures 1 unit in radius. Both of them can effortlessly run at the speed of 1 unit maximum.

1) Suppose the lion is hungry, will he be able to eat up the tamer?
2) If yes, how long can the tamer survive?

You and your two friends are working in a multinational company. How can you three find out the average salary of you all without disclosing your own salary to the other two?

What occurs twice in a week, once in a year but never in a day?

What is the fewest number of coins that would be required in order to make sure each and every coin touches exactly three other coins?

If you're 8 feet away from a door and with each move you advance half the distance to the door. How many moves will it take to reach the door?

In a stable, there are men and horses. In all, there are 22 heads and 72 feet. How many men and how many horses are in the stable