Interview Brain Teaser Puzzles

February 2, 2022

Most Asked Interview Brain Teaser Puzzles With Explanations

Most Asked Interview Brain Teaser Puzzles With Explanations are given here on this page.

Brain Teaser are Questions asked in an interview to the thought process of the candidate. Interview Brain Teasers include Puzzles, Riddles and other trick questions that require presence of mind and an out of the box thinking to answer.

The main reason behind such questions asked in Interview’s are:

To check candidates presence of mind.
Creativitness

Here we have compiled some of the most common Interview brain teaser Puzzles that are asked in Interviews.

Most Asked Interview Brain Teaser Puzzles With Explanations are given here on this page.

The main reason behind such questions asked in Interview’s are:

To check candidates presence of mind.
Creativitness

Here we have compiled some of the most common Interview brain teaser Puzzles that are asked in Interviews.

Sample Puzzles Questions with detailed Solution

Question 1. HOW TO ESCAPE?

You are trapped in a room with two doors. You can walk out of either door, however one of the doors leads to a chamber made up of magnifying glass, and if you enter it the sun will burn up immediately. The other door has a fire breathing dragon as a guard who will burn anyone who tries to pass.

How will you escape?

Solution:-

I’ll simply wait for the night to fall. Once the sun has set I can open the door leading to the magnifying glass chamber. With no sun it cannot burn and I can exit the chamber safely.

Solution:-

I’ll simply wait for the night to fall. Once the sun has set I can open the door leading to the magnifying glass chamber. With no sun it cannot burn and I can exit the chamber safely.

Question 2. NUMBER OF FRUITS?

There is a box full of fruits. All but two are mangoes, all but two are apples, all but two are oranges. How many fruits are there in the box?

Solution:-

There are 3 fruits, 1 mango, 1 apple and 1 orange.

Solution:-

There are 3 fruits, 1 mango, 1 apple and 1 orange.

Question 3. FILL IN THE BLANK

Fawn, Bear, Tiger, Wolf,___? What comes next?

a. Seal

b. Duck

c. Stag

d.Vole

Solution:-

Duck.

In the given series the second letter of each word is a vowel. And they’re arranged in alphabetical order.

fAwn,bEar,tIger,wOlf, so the next one will be dUck, with u as the second letter.

Solution:-

Duck.

In the given series the second letter of each word is a vowel. And they’re arranged in alphabetical order.

fAwn,bEar,tIger,wOlf, so the next one will be dUck, with u as the second letter.

Question 4. KING AND THE PRISONER

A king told his prisoner if he tells a lie the King will shoot him and if he tells a truth the King will hang him. What can the prisoner say such that he escapes?

Solution:-

“You will shoot me.” If they shoot him now, the statement becomes true however they were to hang him for the truth. Consequently if he is hanged the statement becomes a lie, and they were to shoot him for a lie.

Thus in this case the King can’t do either and the prisoner can escape.

Solution:-

Thus in this case the King can’t do either and the prisoner can escape.

Question 5. PLANE CRASH

A plane crashed on the border of India and Bangladesh, where do they bury the survivors?

Solution:-

Why will you bury the survivors?

Solution:-

Why will you bury the survivors?

Question 6. Melting Ice Cubes

A glass of water with a single ice cube in it is kept on a table, After sometime the ice melts away. What happens to the level of water? Does it increase or decrease or remain the same?Why?

Solution:-

The water level remains unchanged as the ice will displace its own weight in the water. It is the Archimedes’ principle, that any floating object displaces its own weight of fluid.

Solution:-

The water level remains unchanged as the ice will displace its own weight in the water. It is the Archimedes’ principle, that any floating object displaces its own weight of fluid.

Question 7. Baking a Pie

If 5 bakers can bake 5 pies in 5 minutes, how many bakers are needed to bake 50 pies in 50 minutes?

Solution:-

This is a commonly asked puzzle question in an interview. You may think the answer is 50, which is obviously wrong. Another answer is 10 which is again wrong.

The correct answer is 5 only.

Equate the question to unitary method,

5 baker bakes 5 pies in 5 minutes, thus

1 baker bakes 1 pies in 5 minutes, and therefore

If given 50 minutes, 1 baker can bake 10 pies ( 1 pie per 5 minutes).

And therefore in 50 minutes 5 bakers can bake 50 pies.

Solution:-

This is a commonly asked puzzle question in an interview. You may think the answer is 50, which is obviously wrong. Another answer is 10 which is again wrong.

The correct answer is 5 only.

Equate the question to unitary method,

5 baker bakes 5 pies in 5 minutes, thus

1 baker bakes 1 pies in 5 minutes, and therefore

If given 50 minutes, 1 baker can bake 10 pies ( 1 pie per 5 minutes).

And therefore in 50 minutes 5 bakers can bake 50 pies.

Question 7. Jumbled Words

If DISTANCE is written as IDTUBECN and DOCUMENT is written as ODDVNTNE, what is HTVSTYAD?

Solution:-

THURSDAY

The first two alphabets are interchanged. DI – ID, similarly HT- TH

The next three alphabets , their succeeding alphabet is written, STA-TUB. And URS-VST

The last three alphabets are reversed, NCE-ECN and DAY-YAD

Solution:-

THURSDAY

The first two alphabets are interchanged. DI – ID, similarly HT- TH

The next three alphabets , their succeeding alphabet is written, STA-TUB. And URS-VST

The last three alphabets are reversed, NCE-ECN and DAY-YAD

Question 8. Password Puzzle

Ash works for a top MNC. One day he tries to log into his system, but is unable to do so. He realises that his password has been reset. He goes to his manager and informs him.

The conversation goes,

Ash:”My old password is out of date. What is my new password?”

Manager:”Although your new password is different, it still has the same amount of letters as the previous one and has four same letters as well.”

Ash hears this and goes back and is now able to log in. What was the old and new password?

Solution:-

Old password: Out of date

New password: Different

You need to read between the lines to understand the puzzle. Out of date and different fit in the conversation with a different meaning, but they’re also the passwords.

And they match the criteria as well. Different and Out of Date has 9 letters and D, E, T, T are the same in both.

Solution:-

Old password: Out of date

New password: Different

You need to read between the lines to understand the puzzle. Out of date and different fit in the conversation with a different meaning, but they’re also the passwords.

And they match the criteria as well. Different and Out of Date has 9 letters and D, E, T, T are the same in both.

Question 9. Paradox

If a girl says, “All girls are liars”, is she telling the truth?

Solution:-

We cannot say.

It is a paradox.

A paradox is a statement that is a statement that contradicts itself. It may be unreasonable, but the statement may or may not be true.

Solution:-

We cannot say.

It is a paradox.

A paradox is a statement that is a statement that contradicts itself. It may be unreasonable, but the statement may or may not be true.

Question 10. Clock Puzzle

How many times in a day does the minute and hour hand of a clock overlap?

Solution:-

22 times,

The hour hand and minute hand overlap every 65 minutes, not 60 minutes.

Thus in 12 hours, they will collide at 12:00,1:05 , 2:10, 3:15, 4:20, 5:25, 6:30, 7:35, 8:40, 9:45 and 10:50. They won’t collide at 11:55 but at 12:00.

Counting in 12 hours they collide 11 times and in 24 hours they collide 22 times.

Solution:-

22 times,

The hour hand and minute hand overlap every 65 minutes, not 60 minutes.

Thus in 12 hours, they will collide at 12:00,1:05 , 2:10, 3:15, 4:20, 5:25, 6:30, 7:35, 8:40, 9:45 and 10:50. They won’t collide at 11:55 but at 12:00.

Counting in 12 hours they collide 11 times and in 24 hours they collide 22 times.

Question 10. Medicine Box and Boat Puzzle

Alice and Bob are stuck on separate islands. Bob is sick and Alice has his medicine in a box. She wants to send it to Bob but the only way to reach him is through a boat. She does not have any boat, but she had heard that a girl called Eve who lives on her island has a boat. She reaches out to Eve asking her if she could use her boat. Eve agrees on the conditions that,

She will not give the boat to Alice but rather take the boat herself to Bob.
The box should be locked, else Eve will steal its contents.

Both Bob and Alice have their own locks with keys. But Bob’s key won’t go in Alice’s lock and same for Alice. How will Alice send in the medicine to Bob?

Eve is willing to do any number of trips and the box can be locked with multiple locks

Solution:-

Alice will put the medicine in the box and lock it with her lock. She will then send it to Bob. Bob will then put his lock on the box and send it back to Alice.

Alice then unlocks her lock and sends it back to Bob, who can then unlock the box with his key and get the medicine.

Solution:-

Alice will put the medicine in the box and lock it with her lock. She will then send it to Bob. Bob will then put his lock on the box and send it back to Alice.

Alice then unlocks her lock and sends it back to Bob, who can then unlock the box with his key and get the medicine.

Question 11. ODI MATCH PUZZLE

She will not give the boat to Alice but rather take the boat herself to Bob.
The box should be locked, else Eve will steal its contents.

Both Bob and Alice have their own locks with keys. But Bob’s key won’t go in Alice’s lock and same for Alice. How will Alice send in the medicine to Bob?

Eve is willing to do any number of trips and the box can be locked with multiple locks

Solution:-

In a normal ODI match this scenario is not possible as the last two balls mean 49.5 and 49.6 balls.

But if this was a different case, let us suppose the match was delayed due to rain and they are playing a match following the Duckworth-Lewis method, where the number of overs and target for the chasing team is decided on some unitary calculations.

Then the match instead of having 50 overs now had say 33.1 over, In that case the 2 remaining balls are the last ball of the 32nd over and first ball of the 33rd over.

Then A can hit a 6 in the last ball of the over, In the next over the strike changes and B is on strike. With one run and one ball remaining he will also hit a 6 at the last ball and complete the century.

Solution:-

In a normal ODI match this scenario is not possible as the last two balls mean 49.5 and 49.6 balls.

Then the match instead of having 50 overs now had say 33.1 over, In that case the 2 remaining balls are the last ball of the 32nd over and first ball of the 33rd over.

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