I have teeth but i don't bite. Who Am I ?

Complete the table series riddle by finding the number that can replace "??".

If you were to put a coin into an empty bottle and then insert a cork into the neck, how could you remove the coin without taking out the cork or breaking the bottle?

People are waiting in line to board a 100-seat aeroplane. Steve is the first person in the line. He gets on the plane but suddenly can't remember what his seat number is, so he picks a seat at random. After that, each person who gets on the plane sits in their assigned seat if it's available, otherwise, they will choose an open seat at random to sit in. The flight is full and you are last in line. What is the probability that you get to sit in your assigned seat?

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

A finger goes in me. You fiddle with me when you're bored. The best man always has me first. What am I?

What will you call your mother's brother's brother-in-law?

The person who makes it has no need for it. He who purchases it does not use it. The person who does use it does not know they are. What is it?

Manish has to secure 40% marks to pass his B.tech final exams.
He got just 40 marks and failed by 40-marks.

What is the maximum marks?

Mr Red Lives in the red house.
Mr Green Lives in the greenhouse.
Mr Yellow Lives in the yellow house.

Who lives in the Whitehouse?