Heaven or Hell Puzzle

Problem: You are standing before two doors. One of the path leads to heaven and the other one leads to hell. There are two guardians, one by each door. You know one of them always tells the truth and the other always lies, but you don’t know who is the honest one and who is the liar.

You can only ask one question to one of them in order to find the way to heaven. What is the question?

This is one of the classic puzzles asked in Infosys interview.

Solution:

The question you should ask is “If I ask the other guard about which side leads to heaven, what would he answer?”. It should be fairly easy to see that irrespective of whom do you ask this question, you will always get an answer which leads to hell. So you can chose the other path to continue your journey to heaven.

This idea was famously used in the 1986 film Labyrinth.

Here is the explanation if it is yet not clear.

Let us assume that the left door leads to heaven.

If you ask the guard which speaks truth about which path leads to heaven, as he speaks always the truth, he

would say “left”. Now that the liar , when he is asked what “the other guard (truth teller) ” would answer, he would definitely say “right”.

Similarly, if you ask the liar about which path leads to heaven, he would say “right”. As the truth teller speaks nothing but the truth, he would say “right” when he is asked what “the other guard( liar ) ” would answer. So in any case, you would end up having the path to hell as an answer. So you can chose the other path as a way to heaven.

Problem: You are standing before two doors. One of the path leads to heaven and the other one leads to hell. There are two guardians, one by each door. You know one of them always tells the truth and the other always lies, but you don’t know who is the honest one and who is the liar.

You can only ask one question to one of them in order to find the way to heaven. What is the question?

This is one of the classic puzzles asked in Infosys interview.

Solution:

The question you should ask is “If I ask the other guard about which side leads to heaven, what would he answer?”. It should be fairly easy to see that irrespective of whom do you ask this question, you will always get an answer which leads to hell. So you can chose the other path to continue your journey to heaven.

This idea was famously used in the 1986 film Labyrinth.

Here is the explanation if it is yet not clear.

Let us assume that the left door leads to heaven.

If you ask the guard which speaks truth about which path leads to heaven, as he speaks always the truth, he

would say “left”. Now that the liar , when he is asked what “the other guard (truth teller) ” would answer, he would definitely say “right”.

Similarly, if you ask the liar about which path leads to heaven, he would say “right”. As the truth teller speaks nothing but the truth, he would say “right” when he is asked what “the other guard( liar ) ” would answer. So in any case, you would end up having the path to hell as an answer. So you can chose the other path as a way to heaven.

The Top 10 Most Interesting Interview Questions:

1. “Do you think you’re a lucky person?”

There are two things you want to avoid here: attributing all of your successes to luck and coming across as cynical. “I thought about this for a few seconds and came to the conclusion that they must be gauging whether I’m an optimist or a pessimist,” Quora user Philemon Onesias says. “I decided to show them I’m the former, but still quite realistic.”

2. “If you could relive the last 10 years of your life, what would you change?”

If you think this sounds like a spin on the classic “greatest weakness” question, you’re right. “Professionally, I answered, ‘I don’t think I’d change anything,’” Erin Millano says. “‘I’ve learned a lot in the past 10 years and [it’s] all helped me grow.’”

[Related: Your Guide to Top Job Interview Questions and Answers]

3. “What are your salary requirements—both short-term and long-term?”

Talking salary is tricky, but talking salary for both the present and future is even trickier. Kate Ross Myers took an open and honest approach with her answer: “I just truthfully said, ‘I did not expect this question.’ I guess it worked, because I’m still working for the same company.” Our take: Give a short-term range, and keep the rest vague. Something like, “I think starting in the range of X and Y is fair—and of course I’d expect an appropriate increase after my annual performance reviews.”

4. “Tell me about a time in your life when you actually failed at something.”

The best way to answer this toughie? ’Fess up about your failures. “After interviewing over a 100 people in my career, this is the question that literally separates contenders from pretenders,” James Hritz says. “It’s interesting how many candidates are loath to admit they have ever failed at anything!”

5. “What can you teach us?”

This question can be pretty illuminating for both the interviewer and interviewee: When Divya Prabhakar was asked, “What can you teach us?” in a job interview, she realized she actually wasn’t a great fit for the company. “It showed me the company valued an interactive and mutual working environment, and if I wanted to have a positive experience there, rather than feel inferior, I should be able to answer this question easily,” she says.

6. “Tell us the most effective approaches for managing you.”

What management style helps you work best? This question, from Quora user Branko Marusic, forces you into the shoes of your potential superiors. “The company wants to ensure that every new employee has the best chance of succeeding,” he explains.

1. “Do you think you’re a lucky person?”

There are two things you want to avoid here: attributing all of your successes to luck and coming across as cynical. “I thought about this for a few seconds and came to the conclusion that they must be gauging whether I’m an optimist or a pessimist,” Quora user Philemon Onesias says. “I decided to show them I’m the former, but still quite realistic.”

2. “If you could relive the last 10 years of your life, what would you change?”

If you think this sounds like a spin on the classic “greatest weakness” question, you’re right. “Professionally, I answered, ‘I don’t think I’d change anything,’” Erin Millano says. “‘I’ve learned a lot in the past 10 years and [it’s] all helped me grow.’”

[Related: Your Guide to Top Job Interview Questions and Answers]

3. “What are your salary requirements—both short-term and long-term?”

Talking salary is tricky, but talking salary for both the present and future is even trickier. Kate Ross Myers took an open and honest approach with her answer: “I just truthfully said, ‘I did not expect this question.’ I guess it worked, because I’m still working for the same company.” Our take: Give a short-term range, and keep the rest vague. Something like, “I think starting in the range of X and Y is fair—and of course I’d expect an appropriate increase after my annual performance reviews.”

4. “Tell me about a time in your life when you actually failed at something.”

The best way to answer this toughie? ’Fess up about your failures. “After interviewing over a 100 people in my career, this is the question that literally separates contenders from pretenders,” James Hritz says. “It’s interesting how many candidates are loath to admit they have ever failed at anything!”

5. “What can you teach us?”

This question can be pretty illuminating for both the interviewer and interviewee: When Divya Prabhakar was asked, “What can you teach us?” in a job interview, she realized she actually wasn’t a great fit for the company. “It showed me the company valued an interactive and mutual working environment, and if I wanted to have a positive experience there, rather than feel inferior, I should be able to answer this question easily,” she says.

6. “Tell us the most effective approaches for managing you.”

What management style helps you work best? This question, from Quora user Branko Marusic, forces you into the shoes of your potential superiors. “The company wants to ensure that every new employee has the best chance of succeeding,” he explains.

Kakuro=

Kakuro puzzles are the \Mathematician's Crossword", as they are much like cross-

words but instead of words, you use numbers. In these puzzles, you are given \clues"

that say what the sum of that column or row is. Using some logical thinking, and a

few tricks, you can nish the puzzle.

Kakuro puzzles are the \Mathematician's Crossword", as they are much like cross-

words but instead of words, you use numbers. In these puzzles, you are given \clues"

that say what the sum of that column or row is. Using some logical thinking, and a

few tricks, you can nish the puzzle.

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Matchstick Frame Puzzle

There are five squares (one 3x3 and four 1x1) formed with 20 matchsticks, as shown in the illustration. Move two matchstick to get seven squares. Overlapping or breaking of matchsticks or "loose ends" are not allowed.

There are five squares (one 3x3 and four 1x1) formed with 20 matchsticks, as shown in the illustration. Move two matchstick to get seven squares. Overlapping or breaking of matchsticks or "loose ends" are not allowed.

You have a basket containing ten apples. You have ten friends, who each desire an apple. You give each of your friends one apple.

Now all your friends have one apple each, yet there is an apple remaining in the basket.

How?

ANSWER---You give an apple each to your first nine friends, and a basket with an apple to your tenth friend.

Each friend has an apple, and one of them has it in a basket.

(Alternative answer: one friend already had an apple and put it in the basket.)

Now all your friends have one apple each, yet there is an apple remaining in the basket.

How?

ANSWER---You give an apple each to your first nine friends, and a basket with an apple to your tenth friend.

Each friend has an apple, and one of them has it in a basket.

(Alternative answer: one friend already had an apple and put it in the basket.)

Birthday Puzzle

When asked about his birthday, a man said:

"The day before yesterday I was only 25 and next year I will turn 28."

This is true only one day in a year - when was he born?

ANSWER---He was born on December 31st and spoke about it on January 1st.

When asked about his birthday, a man said:

"The day before yesterday I was only 25 and next year I will turn 28."

This is true only one day in a year - when was he born?

ANSWER---He was born on December 31st and spoke about it on January 1st.

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In this diagram 11 matches make 3 squares:

Your challenge is to move 3 matches to show 2 squares.

Your challenge is to move 3 matches to show 2 squares.

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