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?

Different lights make me strange by changing me into different sizes. What am I?

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

The dirtier I get, the whiter I look. Who am I?

Mr Black, Mr Gray, and Mr White are fighting in a truel. They each get a gun and take turns shooting at each other until only one person is left. Mr Black, who hits his shot 1/3 of the time, gets to shoot first. Mr Gray, who hits his shot 2/3 of the time, gets to shoot next, assuming he is still alive. Mr White, who hits his shot all the time, shoots next, assuming he is also alive. The cycle repeats. If you are Mr Black, where should you shoot first for the highest chance of survival?

What question can you never answer yes to?

What is at the end of a rainbow?

What 4-letter word can be written forward, backward or upside down, and can still be read from left to right?

Can you find the 09 errors in the picture below?

Can you move 2 matchsticks to form four equal sized squares.