Commonly Asked Interview Puzzle || Interview Puzzles || Interview Riddles || Episode #6

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Commonly Asked Interview Puzzle || Interview Puzzles || Interview Riddles || Episode #6

17 minutes bridge
The scenario comprises of a wobbly bridge and four people. It is the night time and the people have only one torch. Without torch one may risk his life in crossing the bridge. Also we have a condition; the bridge is not quite strong and can hold only two persons together at one. The four people take different time to cross the bridge - 1 min, 2 min, 7 min and 10 min.
Since the torch is a necessity and the bride can't hold more than two persons at a time, two persons must travel at a time out of which one must return with the torch so they don't risk their life crossing in the dark. What is the shortest time that will be required for all of them to cross the bridge?

9 dogs Fencing Puzzle
There are 9 dogs within a fence. By constructing just two more square fences can you make sure that each dog is in isolation?

100 Doors Puzzle
There are 100 doors in a row, all doors are initially closed. A person walks through all doors multiple times and toggle (which means if door is open then close, if door is close then open) person does this in following way:
In first walk, the person toggles every door that is 1, 2 ,3, 4, till 100th door
In second walk, the person toggles every second door, i.e., 2nd, 4th, 6th, 8th, so on, till 100th door.
In third walk, the person toggles every third door, i.e. 3rd, 6th, 9th, 12th so on till 99 in other words person toggles all doors which are multiple of 3 In 100th walk, the person toggles 100th door. Which doors are open in the end?

A door of fate or logics
A prisoner is faced with a decision where he must open one of two doors. Behind each door is either a lady or a tiger. They may be both tigers, both ladies or one of each. If the prisoner opens a door to find a lady he will marry her and if he opens a door to find a tiger he will be eaten alive. Of course, the prisoner would prefer to be married than eaten alive :). Each of the doors has a statement written on it. The statement on door one says, “In this room there is a lady, and in the other room there is a tiger.” The statement on door two says, “In one of these rooms there is a lady, and in one of these rooms there is a tiger. The prisoner is informed that one of the statements is true and one is false. Which door should the Prisoner open?

Box with Defective Balls
You have 10 boxes that contains balls with each of the ball weighing 10 grams precisely. Now among the boxes, one of the box comprises of defective balls with each defective ball weighing 9 grams. You have been provided with an electronic weighing machine but you are allowed to use it only once.

A job interview is an opportunity to impress your potential employers by showcasing your talent and skill set. Apart from asking questions related to your experience and qualification, an interviewer may ask interview puzzles to test your lateral thinking and problem-solving skills. Preparing and answering these puzzles can increase the likelihood of getting hired for a desirable job.

commonly asked interview puzzles

What Are Interview Puzzles?
Interview puzzles are critical-thinking and logical reasoning problems that make candidates use their problem-solving and analytical skills to find a solution. Interviewers prefer to ask these puzzles because it helps them understand your thought process, and your ability to solve complex problems using strategies, and high-order thinking. Usually, candidates applying for software development, data science, or engineering roles may encounter such puzzles. Much like brain teasers and logical reasoning questions, puzzles for interviews may not directly relate to your job role.

By practicing commonly asked puzzles during an interview, you can increase your chances of answering the question correctly. Additionally, how you approach a problem may impress the interviewer and give them evidence of your ability to solve real-world problems.

How To Answer Puzzles For Interviews

Here are a few steps to follow to answer puzzles for interviews:

1. Take some time to think about the problem
2. Seek clarification and ask questions
3. Use strategies you know
4. Explain your answer
5. Provide a solution

[SimplyLogical]

17 minutes bridge
The scenario comprises of a wobbly bridge and four people. It is the night time and the people have only one torch. Without torch one may risk his life in crossing the bridge. Also we have a condition; the bridge is not quite strong and can hold only two persons together at one. The four people take different time to cross the bridge - 1 min, 2 min, 7 min and 10 min.
Since the torch is a necessity and the bride can't hold more than two persons at a time, two persons must travel at a time out of which one must return with the torch so they don't risk their life crossing in the dark. What is the shortest time that will be required for all of them to cross the bridge?

9 dogs Fencing Puzzle
There are 9 dogs within a fence. By constructing just two more square fences can you make sure that each dog is in isolation?

100 Doors Puzzle
There are 100 doors in a row, all doors are initially closed. A person walks through all doors multiple times and toggle (which means if door is open then close, if door is close then open) person does this in following way:
In first walk, the person toggles every door that is 1, 2, 3, 4, till 100th door
In second walk, the person toggles every second door, i.e., 2nd, 4th, 6th, 8th, so on, till 100th door.
In third walk, the person toggles every third door, i.e. 3rd, 6th, 9th, 12th so on till 99 in other words person toggles all doors which are multiple of 3 In 100th walk, the person toggles 100th door. Which doors are open in the end?

A door of fate or logics
A prisoner is faced with a decision where he must open one of two doors. Behind each door is either a lady or a tiger. They may be both tigers, both ladies or one of each. If the prisoner opens a door to find a lady he will marry her and if he opens a door to find a tiger he will be eaten alive. Of course, the prisoner would prefer to be married than eaten alive :). Each of the doors has a statement written on it. The statement on door one says, “In this room there is a lady, and in the other room there is a tiger.” The statement on door two says, “In one of these rooms there is a lady, and in one of these rooms there is a tiger. The prisoner is informed that one of the statements is true and one is false. Which door should the Prisoner open?

Box with Defective Balls
You have 10 boxes that contains balls with each of the ball weighing 10 grams precisely. Now among the boxes, one of the box comprises of defective balls with each defective ball weighing 9 grams. You have been provided with an electronic weighing machine but you are allowed to use it only once.