Can you convert the number zero(0) into a positive number using just one mathematical operator ?

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

Cristina was born in 1888. She just had her 30th birthday today how did that happen?

Can you count the number of quadrilaterals in the picture below?

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

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 am the beginning of the end, and the end of time and space. I am essential to creation, and I surround every place. What am I?

There are 3 apples in the basket and you take away 2. How many apples do you have now?

Why is it against the law for a man living in Delhi to be buried in Mumbai?

I make two people out of one. What am I?