Pankaj Mittal

Frequently Asked Puzzles in Job Interview

Asking Logical Puzzles in Job Interview have become a trend these days.
Below are few of the puzzles asked to candidates in recent Interviews.

If you know the answer comment below :


A lady buys goods worth Rs 200 from a shop, whose shopkeeper is selling the goods with zero profit. The lady gives him a Rs 1000 note.The shopkeeper gets the change from the next shop, keeps Rs 200 for himself, and returns Rs 800 to the lady. Later the shopkeeper of the next shop comes with the Rs 1000 note saying “fake note” and takes his money back. How much of a loss did the shopkeeper take?

Trust me, the answer which comes to your mind maybe the wrong answer.


You have 8 balls all of the same size. 7 of them weigh the same, and one of them weighs slightly more.
How can you find the ball that is heavier by using a balance and weighing twice ?

NOTE : Twice Only


There is a room with a door (closed) and three light bulbs. Outside the room there are three switches, connected to the bulbs. You may manipulate the switches as you wish, but once you open the door you can’t change them. Identify each switch with its bulb.


You are blindfolded and 10 coins are place in front of you on table. You are allowed to touch the coins, but can’t tell which way up they are by feel (heads or tails). You are told that there are 5 coins head up, and 5 coins tails up but not which ones are which.
How do you make two piles of coins each with the same number of heads up?
You can flip the coins any number of times.

This puzzle was asked in Yahoo Interview.


You have 3 jars that are all mislabeled. One jar contains Apple, another contains Oranges and the third jar contains a mixture of both Apple and Oranges.

You are allowed to pick as many fruits as you want from each jar to fix the labels on the jars. What is the minimum number of fruits that you have to pick and from which jars to correctly label them?

Important :
If you are a job seeker, make sure to read and solve as many puzzles as possible.

If interested to practice more such puzzles :
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