Why do Chinese men eat more rice than Japanese men do ?

When I get multiplied by any number, the sum of the figures in the product is always me. What am I?

It can't be seen, can't be felt, can't be heard, and can't be smelt.
It lies behind stars and under hills, And empty holes it fills.
It comes first and follows after, Ends life, and kills laughter.
What is it?

If nine thousand, nine hundred nine dollars is written as $9,909,
how should twelve thousand, twelve hundred twelve dollars be written?

You Throw The Outside, Cook The Inside
Eat The Outside, Throw The Inside.

What Is It?

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

Using Only Five 5's and any mathematical operator make sum as 37

If two's company, and three's a crowd, then whats four and five ?

There are nine dots in the picture that has been attached with this question. Can you join all the dots by drawing four straight lines without picking up your pen?

Can you find the missing piece of the Porsche?