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

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?

You see me once in June, twice in November, and not at all in May. What am I?

There is an exact a week gap between Christmas and New Year. Hence, It is obvious that the new year that comes right after Christmas comes on the same day of the week.

A Strange thing happened in the Year 1777. Christmas occurs on Wednesday and New Year on Monday. How is that possible?

A man dies of old age on his 25 birthday. How is this possible?

how come the second man dies?

Can you find out the smallest number that can be conveyed as the sum of three squares in three unique ways?

John enters a small room. The Door Closes.
When the door opens, John is in a larger room.

Explain?

There were three women in all the swimming costumes!
One was happy and the other two were sad!
The happy one was crying and the sad ones were smiling.
Why was this?

What does below pictogram mean?