What building has the most stories?

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?

You can take four of the five letters out of this word, but the pronunciation never changes. What is the word?

The answer I give is yes, but what I mean is no. What was the question?

Can you decipher the below rebus?

PBLUESAISNUERSES

A number can be multiplied by multiple of nine
i.e 9 18 27 36 45 ...

and the resulting number consist of only one digit.

Can you identify the number ?

Solve the following series:
AZ, GT, MN, __, YB

What does this Rebus Picture means ?

What makes this number unique: 8,549,176,320?

How can a man go eight days without sleep?