Can you arrange four 9's and use at most 2 math symbols, to make the total 100?

Can you find the missing piece of the Porsche?

What occurs twice in a week, once in a year but never in a day?

In a rainy season, one day 3 huge ladies walked under a normal-sized umbrella.
The umbrella is not huge enough to accommodate all 3 ladies yet not a single lady got wet. Why?

John was drowned by he was not wet. How?

We know that money can be names differently for the purpose it is used for. Some of the examples of money given at following places or for following activities:

In temple = Daan
In school = Fees
During marriage = Dowry
For divorce = Alimony
Paying government = Tax
In court = Fine
Employer to employee = Salary
To kidnappers = Ransom
For illegal reason = Bribe
To civil servant retirees = Pension

Do you know what do we call the money a husband gives to his wife?

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

which number am I?

Replace the question mark with the correct number.

You are given a cube that is made with the help of 10x10x10 smaller cubes summing up to a total of 1000 smaller cubes. You are asked to take off one layer of the cubes.
How many remain now?

what does this picture(rebus) riddle means ?