What has to be broken before you can use it?

Which Number is the odd one out?

A) 7145
B) 2716
C) 5321
D) 4135

A King wants to send the diamond ring to his girlfriend securely. He got multiple locks and their corresponding keys. His girlfriend does not have any keys to these locks and if he sends the key without a lock, the key can be copied in the way. How can King send the ring to his girlfriend securely?

Can you find a number that lies one third of the distance between 1/3 and 2/3?

Replace the question mark with the correct number.

2 + 2= 4
3 + 3= 18
4 + 4= 48
5 + 5= ?

There are are five things wrong with this sentence; only geniuses will be able to to spot all of the mitstakes

What is the Surname of Barbie Doll?

A seven-year-old kid challenged his classmates that he can make the number one disappear by adding something to it.

How can he do that?

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?

Move four matchsticks to the below square to form three squares?