You must be tired of reading the usual aptitude questions and thus GPuzzles.Com brings you the list of Cool Interview Puzzles that fore mostly offers you a different feel. Secondly you must try solving these Cool Interview Questions as they will help you crack the interviews by channelizing your IQ in the right direction.
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Cool Interview Puzzles #1 - Interview Marble Logic Puzzle

Difficulty Popularity

You are given a set of scales and 12 marbles. The scales are of the old balance variety. That is, a small dish hangs from each end of a rod that is balanced in the middle. The device enables you to conclude either that the contents of the dishes weigh the same or that the dish that falls lower has heavier contents than the other.
The 12 marbles appear to be identical. In fact, 11 of them are identical, and one is of a different weight. Your task is to identify the unusual marble and discard it. You are allowed to use the scales three times if you wish, but no more.

Note that the unusual marble may be heavier or lighter than the others. You are asked to both identify it and determine whether it is heavy or light.

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Cool Interview Puzzles #2 - Tough Two Jug Measuring Puzzle

Difficulty Popularity

I got two jugs of
A) 11 liter
B) 6 liter

How can I measure exactly 9 liters ?

By Admin
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Cool Interview Puzzles #3 - The Fifth Card Magic Trick Puzzle

Difficulty Popularity

Famous magicians Dylan Rhodes and Daniel Atlas performed an exhilarating magic trick in my last birthday party. Since, it was my birthday, Rhodes asked me to shuffle a new deck and pick any five cards out of it. I took out the cards as asked, looked at them and then showed all five cards to Rhodes. Rhodes then gave four cards to Daniel and the remaining fifth card to me. Daniel looked at the four cards for about ten seconds and then he told me what card I was holding.

Surprise, Surprise! He was right!

It was quite surprising to me at that time, but when I reached back home, I was able to crack the trick behind the magic.

Can you?

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Cool Interview Puzzles #4 - Most Popular Logical Puzzle

Difficulty Popularity

Outside a room there are three light switches. One of switch is connected to a light bulb inside the room.
Each of the three switches can be either 'ON' or 'OFF'.

You are allowed to set each switch the way you want it and then enter the room(note: you can enter the room only once)

Your task is to then determine which switch controls the bulb ??

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Cool Interview Puzzles #5 - Crossing The River In Minimum Time Puzzle

Difficulty Popularity

Four people need to cross a dark river at night.

* They have only one torch and the river is too risky to cross without the torch.
* If all people cross simultaneously then torch light wont be sufficient.
* Speed of each person of crossing the river is different.cross time for each person is 1 min, 2 minutes, 7 minutes and 10 minutes.

What is the shortest time needed for all four of them to cross the river ?

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Cool Interview Puzzles #6 - Box Ball Logic Problem

Difficulty Popularity

There are three bags.The first bag has two blue rocks. The second bag has two red rocks. The third bag has a blue and a red rock. All bags are labeled but all labels are wrong.You are allowed to open one bag, pick one rock at random, see its color and put it back into the bag, without seeing the color of the other rock.

How many such operations are necessary to correctly label the bags ?

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Cool Interview Puzzles #7 - Famous Probability Puzzle

Difficulty Popularity

This is a famous probability puzzle in which you have to choose the correct answer at random from the four options below.
Can you tell us whats the probability of choosing correct answer in this random manner.

1) 1/4
2) 1/2
3) 1
4) 1/4

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Cool Interview Puzzles #8 - Impossible Brain Teaser

Difficulty Popularity

In a recreational activity, you are given four different jars of 2 liters, 4 liters, 6 liters and 8 liters respectively with an unlimited water supply. Then you are asked to measure exactly 5 liters of water using them.

How will you do it?

By Admin
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Cool Interview Puzzles #9 - Wine Bottle Puzzle

Difficulty Popularity

A lab scientist has nine bottles of wine. However, he used one of the bottles in an experiment and is currently poisoned. The poison is deadly and only one sip will make any living being die instantly.

So how can a lab scientist can find the poisoned wine bottle by using just two mice labs.

By Admin
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Cool Interview Puzzles #10 - Classic Card Brain Teaser

Difficulty Popularity

A pack of cards has 52 cards. You are blindfolded. Out of 52, 42 cards are facing down while 10 are facing up. You have been asked to divide this pack of cards into two decks - so that each deck contains an equal number of face up cards. Remember, you are blindfolded.

How will you do it?

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