What is the Surname of Barbie Doll?

Below the four parts have been reorganised. The four partitions are exactly the same in both arrangements. Why is there a hole?

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?

Identify Me

Hint1: I am a god
Hint 2: I am a planet
Hint 3: measurer of heat

Decode this picture on T-Shirt and tell what it says ?

Christina has four daughters, and each of her daughters has a brother. How many children does Christina have?

10 people came into a hotel with 9 rooms and each guest wanted his own room. The bellboy solved this problem.
He asked the tenth guest to wait for a little with the first guest in room number 1. So in the first room, there were two people. The bellboy took the third guest to room number 2, the fourth to number 3, ..., and the ninth guest to room number 8. Then he returned to room number 1 and took the tenth guest to room number 9, still vacant.
How can everybody have his own room?

What happened when the wheel was invented?

Which letter of the alphabet has the most water?

Which wheel of car does not rotate when you turn your car right?