Aptitude Questions : Sun Pharma Mystery Interview Question

Difficulty Popularity

A car thief stole a car but he did not know that the car belonged to Sherlock Holmes. When the fact was known to Holmes, he started investigating the case and as we know how good he is at that, four suspects were arrested soon. All four of them were seen near his car at the time when it was stolen.

He asked his partner Dr. Watson to examine the four suspects as he was busy in some other case. Dr. Watson used a newly invented lie detector while taking statements from the suspects. Each suspect gave three statements which are mentioned below:

Suspect A:
1. "In high school, I was in the same class as suspect C."
2. "Suspect B has no driving license."
3. "The thief didn't know that it was the car of the chief of police."

Suspect B:
1. "Suspect C is the guilty one."
2. "Suspect A is not guilty."
3. "I never sat behind the wheel of a car."

Suspect C:
1. "I never met suspect A until today."
2. "Suspect B is innocent."
3. "Suspect D is the guilty one."

Suspect D:
1. "Suspect C is innocent."
2. "I didn't do it."
3. "Suspect A is the guilty one."

At the end of it, Dr. Watson became confused by so many contradicting statements made by the suspects. The lie detector also malfunctioned and it could just tell that out of all the 12 statements made, only 4 were true. He then told all the details to Sherlock who found the car thief within moments.

Can you find out who the car thief is?

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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 ?

Aptitude Questions : Awesome Probability Logic Riddle

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You need to divide 50 marbles(25-red and 25-blue) into two boxes such that the probability of picking red marble is maximized.

Following conditions need to hold true :
1. None of box is empty
2. All the marbles must be in one of two boxes.
category : LOGIC

Aptitude Questions : Interview Marble Logic Puzzle

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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.
category : LOGIC

Aptitude Questions : Difficult Brain Twister

Difficulty Popularity

A strange tradition is followed in an orthodox and undeveloped village. The chief of the village collects taxes from all the males of the village yearly. But it is the method of taking taxes that is interesting.

The taxes paid in the form of grains and every male should pay equal pounds corresponding to his age. In simpler terms, a man aged 10 years will have to pay 10 pounds of grains and a 20 years old will be paying 20 pounds of grain.

The chief stands on a riser containing 7 different weights next to a large 2 pan scale. As per the interesting custom, the chief can only weigh using three of the seven weights.

In such a scenario, can you calculate what must be the weights of the seven weights each and who is the oldest man the chief can measure using those weights?
category : LOGIC | MATHS

Aptitude Questions : Best Thinking Brain Teaser Ever

Difficulty Popularity

Three men are living in a desert namely – Alex, Brian and Chris.

Alex hates Chris and thus he decides to kill him. To succeed in his evil intentions, he poison the water supply of Chris. Since they are living in desert, he will have to drink water or he will die of thirst.

Brian is not aware of the actions of Alex and he plans to kill Chris as well. To do this, he killed the water supply of Chris.

Chris dies due to his thirst. Who killed him?

Aptitude Questions : Logic Problem Brain Teaser

Difficulty Popularity

The world is facing a serious viral infection. The government of various countries have issued every citizen two bottles. You as well have been given the same. Now one pill from each bottle is to be taken every day for a month to become immune to the virus. The problem is that if you take just one, or if you take two from the same bottle, you will die a painful death.

While using it, you hurriedly open the bottles and pour the tablets in your hand. Three tablets come down in your hand and you realize they look exactly the same and have same characteristics. You can’t throw away the pill as they are limited and you can’t put them back or you may put it wrong and may die someday.

How will you ensure that you are taking the right pill?
category : LOGIC

Aptitude Questions : 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

Aptitude Questions : Tough River Crossing Riddle

Difficulty Popularity

This one is a bit of tricky river crossing puzzle than you might have solved till now. We have a whole family out on a picnic on one side of the river. The family includes Mother and Father, two sons, two daughters, a maid and a dog. The bridge broke down and all they have is a boat that can take them towards the other side of the river. But there is a condition with the boat. It can hold just two persons at one time (count the dog as one person).

No it does not limit to that and there are other complications. The dog can’t be left without the maid or it will bite the family members. The father can’t be left with daughters without the mother and in the same manner, the mother can’t be left alone with the sons without the father. Also an adult is needed to drive the boat and it can’t drive by itself.

How will all of them reach the other side of the river?
category : LOGIC | TRICK

Aptitude Questions : Logic Math Problem

Difficulty Popularity

David and Albert are playing a game. There are digits from 1 to 9. The catch is that each one of them has to cut one digit and add it to his respective sum. The one who is able to obtain a sum of exact 15 will win the game?

You are a friend of David. Do you suggest him to play first or second?
category : LOGIC | TRICK

Aptitude Questions : Spot The Difference Christmas Tree Riddle

Difficulty Popularity

Can you spot 5 differences in two Christmas tree below?

category : PICTURE

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