What is the fastest way to double your money?

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

What is the word or phrase below?
R | E | A | D

What does this below rebus puzzle mean?

Can you count the number of quadrilaterals in the picture below?

P is the father of Q and S is the son of R. T is the brother of P and has a daughter U. If R is the sister of P, then what is the relation between U, Q and S?

Sweet & very intelligent katty has 8 puppets(Jane Bird Barbie Angel Colleen Nora Lass Missy).
All puppets are of different size. She arrange all puppets to face towards the guest and tell the guess the following clues :

* Jane has three puppets bigger on its left side
* Bird has two puppets smaller on its left side
* Barbie has one puppet bigger on its right side
* Angel has two puppets smaller on its right side
* Colleen has one puppet bigger on its left side
* Nora has one puppet smaller on its left side
* Lass has four puppets bigger on its right side
* Missy has three puppets smaller on its right side

Also some puppets are inside the bigger puppets.

Assuming you are the guest , can you tell the katty how the puppets are arranged ?

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

Our product and our sum always give the same answer. Who are we?

What is black when you buy it, red when you use it, and gray when you throw it away?