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Aptitude Questions : Alien Invasion Interview Puzzle

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An alien force has invaded the realms of the earth. All they plan is the destruction of the entire planet. However, they have given humans a chance. They picks up ten intelligent most humans (you are one of them) and take them in a pitch black room. There is nothing you can see in the total darkness. The aliens place a hat on every human. The hats are of two colors - pink and green. After they place all the hats, the lights are turned on.

You are not allowed to see your own hat. The circulation of the hat is totally random with any kind of possible combination. The aliens start from the back and ask, "What is the color of hat you are wearing?" Everyone is allowed to hear the answer. If he gives the correct answer, he will be allowed to live and save the people but if he gives the wrong answer, he will be killed mercilessly and the people you represent will be killed.

What will you do to save as many lives as you can?

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Aptitude Questions : Spot The Difference Christmas Tree Riddle

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Can you spot 5 differences in two Christmas tree below?

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Aptitude Questions : Hard Logic Brain Teaser

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There are 100 doors. 100 strangers have been gathered in the adjacent room. The first one goes and opens every door. The second one goes and shuts down all the even numbered doors – second, fourth, sixth... and so on. The third one goes and reverses the current position of every third door (third, sixth, ninth… and so on.) i.e. if the door is open, he shuts it and if the door is shut, he switches opens it. All the 100 strangers progresses in the similar fashion.

After the last person has done what he wanted, which doors will be left open and which ones will be shut at the end?

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Aptitude Questions : Tough Two Jug Measuring Puzzle

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

How can I measure exactly 9 liters ?

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Aptitude Questions : Unique Brain Teaser

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It takes ten minutes to fry a steak (five minutes for each side). You are frying the steaks in a pan that can accommodate only two steaks at one time. What is the least amount of time by which you can fry all the three steaks you have?

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Aptitude Questions : IAS Interview Problem

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I need to divide numbers from 1 to 9 into two group such that sum of numbers in one group is equal to the sum of other group.
Note : 6 cannot be flipped over to make it 9.

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Aptitude Questions : Math IQ Question

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Adam is one of the finalist in an IQ championship. As the final test, he is provided with two hourglass. One of them can measure eleven minutes while the other one can measure thirteen minutes.
He is asked to measure exactly fifteen minutes using those two hourglasses. How will he do it ?

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Aptitude Questions : Popular Interview Problem

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I have two rectangular bars.

They have property such that when you light the fire from one end , it will take exactly 60 seconds to get completely burn.
However they do not burn at consistent speed (i.e it might be possible that 40 percent burn in 55 seconds and next 60 percent can burn in 10 seconds).

Problem is : How do you measure 45 seconds ?

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Aptitude Questions : Logical Arrangement Bonfire Puzzle

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30 classmates went for a bonfire. While sitting around the fire, they decided to play a game. To play it, they divided themselves into 5 teams in a way that there were 5 rows having 7 people each.

How can this arrangement be possible while sitting around the bonfire?

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Aptitude Questions : No Death Penalty For Kill Riddle

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Ramsay was killed by Sansa in front of everyone but the judge was not sure how to punish Sansa. Why is the judge confused?

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Aptitude Questions : Game Of Dice Brain Teaser

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A unique solo game of dice is being played. Two dices are thrown in each turn and the scores are taken by multiplying the numbers obtained.

Now talking about a particular game, here are the facts:
1) The score for the second roll is five more than the score for the first roll.
2) The score for the third roll is six less than the score for the second roll.
3) The score for the fourth roll is eleven more than the score for the third roll.
4) The score for the fifth roll is eight less than the score for the fourth roll.

Reading the above facts, can you tell the score for each of the five throws?

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