What is the fastest way to double your money?

Can you solve the rebus below?

Women do it once a year after they turn 19 but men get to do it only once in a lifetime. What is it?

Most people think of me as money. But when they find me in the water, they won’t get any money out of me. What am I?

How many words can a quill made with the feather of a pigeon write with a 100ml bottle of black ink?

Okay before we begin with the puzzle, do keep in mind that you have to answer it quickly.

You are participating in a car race. Seeking the perfect moment, you overtake the second person in the race. What positions are you in now?

A rubber ball keeps on bouncing back to 2/3 of the height from which it is dropped. Can you calculate the fraction of its original height that the ball will bounce after it is dropped and it has bounced four times without any hindrance ?

Can you complete the sequence?

192, 021, 222, 324, 252, 627, 2__, 9__?

Alpha is Beta's sister.

Gamma is a Beta mother.

Delta is Gamma's father.

Tango is Delta's mother.

Then,

How is Alpha related to Delta?

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?