Many have heard it, but nobody has ever seen it, and it will not speak back until spoken to. What is it?

A bomb exploded in a room full of married couples and no one died. How?

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?

How can you tell a raw egg from a hard-boiled egg?

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

A father's child, a mother's child, yet no one's son.

Who am I?

Luis Garavito killed Density x Volume.

Who is Luis Garavito ?

Find the missing letter in the last circle logically in the given below picture.

There are 2 cops parked along a one-way street looking for traffic violations. They spot a taxi driver going in the wrong direction, yet they do nothing.

Why?

In the picture, you can see a chess board. On the top left position, the K marks a knight. Now, can you move the knight in a manner that after 63 moves, the knight has been placed at all the squares exactly once excluding the starting square?