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 can see three almost identical images below. Can you spot the odd one out from them?

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How would you measure exactly 4 litres in the least number of steps?

What animal walks on four legs in the morning, two legs during the day, and three legs in the evening?

Oedipus, the king of Thebes, figured out the answer to the riddle:

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PS: No other resource is available to you on the island, neither can you build anything.

If six children and two dogs were under an umbrella, how come none of them got wet?