Find the value of "?" in the ball picture Riddle below:

How many times can you subtract the number two from the number fifty?

Luis Garavito killed Density x Volume.

Who is Luis Garavito ?

What is the largest amount of money that you can possess in change and still if someone asks you for a dollar, you won't be able to give?

A maths symbol is hidden in the below Bar Graph. Can you decipher it?

Why do Chinese men eat more rice than Japanese men do ?

what one word does the below rebus identifies?

John named his first son Alpha, second Beta, third Charlie and fourth Delta. What is the fifth son's name?

Here is what you have to do. You have to throw a ball as hard as you can but it must return back to you even if it does not bounce at anything. Also, you have nothing attached to the ball. There is no one on the other end to catch that ball and throw it back at you.

How will you do it?

One day, all the courtiers from Akbar's court were gathered in the assembly hall when one of them told the Emperor that all his valuables had been stolen by a thief the previous night.
This shocked the Emperor to his core as the place where that courter stayed was the most secured in the kingdom. The Emperor thought that it is not at all possible for an outsider to enter into the courtier's house and steal the valuables. Only another courtier could commit this crime. He quickly called Birbal to identify the thief.
Birbal thought for a while and successfully solved the mystery by identifying the thief in just one statement.
What did Birbal say?