Replace the question mark with the number below given a simple math problem.

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

I am a prime number.
The double of myself is equal to the square of me.

which number am I?

Which letter of the alphabet has the most water?

A dead body is found outside a multi-story multinational company. The case is reported and a homicide detective is called on the crime scene.

He looks at the body and then towards the building. From the position of the body, it is evident that the victim committed suicide. He goes to the first floor of the building and then walks in the direction of the dead body, opens the window and toss a coin in the air.

He goes to second floor and again repeats the process. He keeps doing this till he is done on all the floors. Then he returns back to the floor and tells his team that it is a murder.

How in heaven did he deduce that?

It begins where the time ends.
Its second is an expression of surprise.
Its third is a question.
Its fourth is urinate.
It ends with a drink.

Which country it is?

Solve the equation by replacing the alphabet with numbers.

MOM + MOM + NO = BOOK=

There are two candles. Both will only burn exactly for an hour. How will you use these two candles to measure forty-five minutes?

The following alphametic has only one solution. Can you find it?
ENLIST + SILENT + LISTEN = ANAGRAM

PS: You may start the number from 0.

How many minutes are there in Feb 2017?

Note: The shortest answer is the correct answer.