What brings you down but never up?

This was asked in an interview with Coa-Cola.

The interviewer has given me 100 marbles(50 white and 50 black) and two empty boxes.
He then told me that he will leave the room and i need to place all the marbles in two boxes.

And When he come back, he will draw a marble from any of the two box and if the marble is white I will be hired.

Also
* No box can be empty.
* All 100 marbles must be placed in one of the two boxes.

So what should I have done?

I’m light as a feather, yet the strongest person can’t hold me for five minutes. What am I?

The cream is heavier than Milk. True or False?

Which country gets ill every time?

They are the five precious gems of an everyday sort and all can be found on a Tennis Court. Who are they?

What runs around the whole yard without moving?

Solve the puzzle by telling what does below picture means.

Steffi's daughter Jazelle needs to be picked up from school every day.
Steffi asks one of her colleagues to pick up Jazelle from the school. Steffi devised a password system to confirm that Jazelle goes with the correct colleague only.

The password on Monday was SJM16.
The password on Wednesday was TAW39.

What will the password be for Friday?

In the given figure, you can see that four match sticks are used to form a square. Can you form five squares by using six matches?