There is a square of a particular number which when doubled, becomes 7 more than its quarter.

Can you find the number?

A man is trapped in a room. The room has only two possible exits doors. Through the first door there is a room constructed from magnifying glass. The blazing hot sun instantly fries anything or anyone that enters. Through the second door there is a fire-breathing dragon. How does the man escape?

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?

Which English verb becomes past tense just by rearranging the letters?

What number does the below three word/phrase identify and why?
1. Deck
2. Year
3. Singing in the Rain

In the picture given below, can you find out which digit will take place of the question mark?

How can you make the following equation true by drawing only one straight line: 5+5+5=550 ?

Can you replace the question mark with the correct number in the below table sequence?

There's one "sport" in which neither the spectators nor the participants know the score or the leader until the contest ends.

What is it?

Identify Me

Hint1: I am a god
Hint 2: I am a planet
Hint 3: measurer of heat