Always in you, Sometimes on you;

If I surround you, I can kill you.

What am I?

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?

Replace the question mark with the correct number.

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

This is a picture puzzle. You have to guess the name of the movie that can be related to the picture.

John is the son of Jacob.
So,
Jacob is the_____of John's father?

Can you identify the Oscar-winning movie from the rebus below?

You are playing a game with your friend Jack. There are digits from 1 to 9. You both will take turn erasing one digit and adding it to your score. The first one to score 15 points will win the game.

Would you want to play first or second?

PS: The sum should be exactly 15.

It belongs to you, but other people use it more than you do. What is it?

I have a five and a three-gallon jar. Assuming there is an infinite supply of water, how can I measure one-gallon water?

What is full of holes but still holds water?