Replace the question mark with the correct number in the below-given picture?

Imagine you are in a room with no windows or doors. How will you get out?

Cristina was born in 1888. She just had her 30th birthday today how did that happen?

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?

Why are all black people so quick ?

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

'S' refers to the number of seconds in a day and 'H' refers to the number of hours in ten years. Which quantity out of these two is greater?

Can you find the largest Three-digit number whose sum is 14 and whose square is less than 5,00,000?

A shepherd had 18 sheep, out of which, all but ten died.

Can you tell us how many sheep was he left with?

Take one out and scratch my head, I am now black but once was red. What am I?