What number should come in place of the question mark below?

Decode the below four famous ciphers:

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

A word I know,
Six letters contain,
Subtract just one,
And twelve is what remains.

What is red and smells like blue paint?

I am the one who remains awake when you sleep. But I need to rest when you awake. Who Am I?

I am a type of vehicle that has two wheels and is powered by humans. What am I?
Hint 1: You can ride me for exercise.
Hint 2: I am environment-friendly.

John left on a horse on Thursday , was gone for two days, and came back on Thursday after completing his work. How did that happen?

Use only one mathematical symbol and all numbers (0-9) to get a sum of 99

Twice ten are six of us,

Six are but three of us,

Nine are but four of us;

What can we possibly be?

Would you know more of us?

Twelve are but six of us,

Five are but four, do you see?

What are we?

What begins with T, ends with T, and has T in it?