By Admin
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#1 - Interesting Gold Bar Interiew Puzzle

Difficulty Popularity

You are a king of an empire. You have a servant working in your palace. He works all the seven days and you only pay him in the form of gold bar. You must pay the worker for his work every day at the end of the day.

If you are only able to make two breaks in the gold bar, how will you pay the servant if the servant works for the equal time every day and thus equal amount must be paid at the end of the day?

By Admin
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#2 - Crossing Bridge Interview Puzzle

Difficulty Popularity

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?

By Admin
  • Views : 50k+
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#3 - Measure the Water Interview Question

Difficulty Popularity

You have infinite supply of water. You also have 5 quart and 3 quart buckets. What is the least number of steps you will require to measure precisely 4 quarts?

By Admin
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#4 - Monty Hall Interview Problem

Difficulty Popularity

Sarah and Michael are a loving couple. One night Sarah playfully places three identical boxes on a table in front of Michael. Out of the three boxes, one contains a pearl and other two are empty. Michael is then allowed to pick any one of them. Now between the two boxes that remain on the table, at least one is empty. Sarah removes one empty box from the table. Now Michael must choose from the box he picked or the box on the table.

What box should Michael choose?

By Admin
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#5 - Light Switches Interview Puzzle

Difficulty Popularity

A room has three light switches. The light switches are located outside the room with a closed door. Only one of them is the actual switch that can control the lights inside the room. You are allowed to turn those switches as many times as you wish. Please note that you can't identify from outside whether the lights are on or off.

You can enter the room only once to see the light. You can't change the light switches once you are inside. Rule out all the illogical answers like there is a window in the room or someone inside can help you with the answer etcetera.

Based on what information and guidelines have been provided to you, can you determine the exact switch that controls the light inside the room?

By Admin
  • Views : 40k+
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#6 - Cipher Interview Problem

Difficulty Popularity

Sherlock Holmes was decoding an encrypted message. If in the encryption, DISTANCE is written as IDTUBECN and DOCUMENT is written as ODDVNTNE.

Can you help him decipher HTTQYAD?

By Admin
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#7 - Alien Invasion Interview Puzzle

Difficulty Popularity

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?

By Admin
  • Views : 40k+
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#8 - Logicians Interview Puzzle

Difficulty Popularity

Hundred most brilliant logicians are handpicked from the world and invited to a room. But before they could enter, they are told that at least one of them has a black forehead. Whenever anyone can frame out that he is having a black forehead, he needs to leave the room when the lights are turned off. After that, the lights are turned back on and those who could infer that their forehead was black have left the room.

What happens if they have painted every forehead black?

By Admin
  • Views : 30k+
  • Sol Viewed : 10k+

#9 - Faulty Clock Interview Puzzle

Difficulty Popularity

A particular clock was 7 minutes late at 3 pm on Wednesday and 8 minutes ahead of the time at 4 pm on Friday.

When will the clock show the right time?

By Admin
  • Views : 20k+
  • Sol Viewed : 10k+

#10 - Time Work Interview Problem

Difficulty Popularity

Two passenger trains are traveling in opposite direction. The distance between them is 110 Kms. One of them starts at 4 AM and the other starts at 5 AM on a velocity of 20 and 25 KMPH respectively.

What is the time when they both will meet?

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