Decode the below four famous ciphers:

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

What always comes into a house through the keyhole?

If,

6 / 7 = 2
3 / 9 = 7
8 / 2 = 6

Then

4 / 5 = ?

our enemy challenges you to play Russian Roulette with a 6-cylinder pistol (meaning it has room for 6 bullets). He puts 2 bullets into the gun in consecutive slots, and leaves the next four slots blank. He spins the barrel and hands you the gun. You point the gun at yourself and pull the trigger. It doesn't go off. Your enemy tells you that you need to pull the trigger one more time, and that you can choose to either spin the barrel at random, or not, before pulling the trigger again. Spinning the barrel will position the barrel in a random position.

Assuming you'd like to live, should you spin the barrel or not before pulling the trigger again?

What kind of tree can you carry in your hand?

What is the next number in this series?

4,12,84,3612....

There are 2 cops parked along a one-way street looking for traffic violations. They spot a taxi driver going in the wrong direction, yet they do nothing.

Why?

10+10 and 11+11 can give you the same answer.

Explain how?

If 5 cats catch 5 mice in 5 minutes, how long will it take one cat to catch a mouse?

What 4-letter word can be written forward, backward or upside down, and can still be read from left to right?