Why is it against the law for a man living in Delhi to be buried in Mumbai?

Decode the below four famous ciphers:

8P of the SS
1M of the E
1S of the SS
60M in 1H

If a wheel has 54 spokes, how many spaces are there between the spokes?

You throw me out when you want to use me and you take me in when you don't want to use me.

Who Am I?

A tree doubled in height each year until it reached its maximum height over the course of ten years. How many years did it take for the tree to reach half its maximum height?

What is a word made up of 4 letters, yet is also made up of 3. Sometimes is written with 9 letters, and then with 4. Rarely consists of 6, and never is written with 5.

In an Art Gallary, When the clock hit 11 am, Artist hung the painting number 30. When it struck 4 pm, he hung painting number 240 and when it struck 7:30 pm, he hung painting number 315.

Can you determine, which painting number will he hang when the time is 9:20 pm?

A Detective reviewed the information they had on the case so far.

A lady named 'Caterina' was found shot and they already had a list of suspects - Ankit, Tarun, Harish, Manoj and Manish.
The killer is a fan of challenges him by leaving notes ad various places.
* The first was found in a toilet room.
* The second was found in an art room.
* The third was in a restroom.
* the fourth in an underwater room.
* The fifth at the no-smoking room.

All of the notes read the same thing, 'The clues are where you find the notes.' Yet, nothing was found at any place the notes were.
Detective the genius, immediately solved the case.
Who was the killer?

Quickly Solve this riddle

7 - 4 + 3 * 0 + 1 = ?

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