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

You find yourself in a strange place guarded by two guards.One of the guard always say truth while other always lies.You don't know the identity of the two.You can ask only one question to go out from there. What should you ask?

You walk into a room that contains a match, a kerosene lamp, a candle and a fireplace. What would you light first?

How many minutes are there in Feb 2017?

Note: The shortest answer is the correct answer.

Can You Find the Missing Zero? A Number Puzzle that Will Trick Your Eyes

John was piloting a plane behind a car but was never able to overtake it. Why?

What numbers should go on the bottom line?
3 6 9 15
8 2 10 12
11 8 19 27
19 10 29 39
? ? ? ?

John is now two fifth of his older brother's age and two years from now he will be half of his older brother's age.
Two years ago, John was only one-fourth the age of his older brother age at that time.

How old is John now?

How can a man go eight days without sleep?

You see a mathematical expression in the picture. Can you think of a movie that this expression refers to?