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Thread: Interesting Questions/Problems

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    Lobo's Avatar
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    Default Interesting Questions/Problems

    Here are a couple of problems that some might have heard already.

    1) There are two doors with one guard in front of each. Behind one of the doors is the right path, while the other one leads to certain death. There is no way for you to know which one leads to what path except by asking each of the two guards. However, you can only ask one question to one of the guards, and one of them says only truths and the other only lies. You also don't know who is the liar and who tells the truth. What would be the question to ask?

    2) There are two cars owned respectively by two drivers. Both are in a race where the car reaching last place is actually the winner. The problem is that at the start of such a race, both drivers logically do not move their cars and the race cannot even start. Without changing the rules, what would be done in order for the race to get underway?


    Feel free to post any interesting question type things. Ethical dilemmas count too. Here is one that comes to mind:

    3) If you were in a situation where you have to chose between two people you love from falling from a cliff, but you can only save one, which one would you choose? This is one really tough.

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    I've always hated these sort of riddle things. The answer always seems to include some un-mentioned, and very important factor...such as that there was also a dinosaur with purple spots! Is the fact that I hate these related to some function? Like Ti??
    Hi! I'm an ENFP. :-)

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    Creepy-Diana

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    Quote Originally Posted by Sereno View Post
    Here are a couple of problems that some might have heard already.

    1) There are two doors with one guard in front of each. Behind one of the doors is the right path, while the other one leads to certain death. There is no way for you to know which one leads to what path except by asking each of the two guards. However, you can only ask one question to one of the guards, and one of them says only truths and the other only lies. You also don't know who is the liar and who tells the truth. What would be the question to ask?
    I could do it in two questions

    Can you understand me?

    Liar says No
    Truth Teller says Yes

    Ask truth teller is your door the right door

    Nah i remember the answer so no point saying it. Dont think i could ever work it out myself tho
    ENFp (Unsure of Subtype)

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    Quote Originally Posted by Sereno View Post
    Here are a couple of problems that some might have heard already.

    1) There are two doors with one guard in front of each. Behind one of the doors is the right path, while the other one leads to certain death. There is no way for you to know which one leads to what path except by asking each of the two guards. However, you can only ask one question to one of the guards, and one of them says only truths and the other only lies. You also don't know who is the liar and who tells the truth. What would be the question to ask?
    Ask him an easily identifiable answer.
    - hold up 3 fingers, and ask him how many you are holding up. It doesn't matter which guard you ask. If he is the truth teller, he will answer correctly, and then he will answer the door question correctly. If he is the liar, then take the opposite door.

    heh, as him a question you already know the answer too


    2) There are two cars owned respectively by two drivers. Both are in a race where the car reaching last place is actually the winner. The problem is that at the start of such a race, both drivers logically do not move their cars and the race cannot even start. Without changing the rules, what would be done in order for the race to get underway?
    - Get a third driver who doesn't know the rules.
    - Move the starting point / move the end point
    - pull out a gun and say "get moving"
    - lots more bs answers


    Feel free to post any interesting question type things. Ethical dilemmas count too. Here is one that comes to mind:

    3) If you were in a situation where you have to chose between two people you love from falling from a cliff, but you can only save one, which one would you choose? This is one really tough.
    I really don't like questions like that.
    Whoever I has the best chance of saving.
    It would be a pretty mechanical process of "what tier of relationship priority are these people on"
    Pre-2013 post are written with incomplete understanding.

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    If I take the path behind the liar, will I die?
    I dont think that one quite works

    D1
    Liar
    Life Door

    D2
    Truth teller
    Death Door

    Liar: "If I take the path behind the liar, will I die?" - Yes
    Truth teller: "If I take the path behind the liar, will I die?" - No

    So it seems your no closer to knowing which is the right door.

    Quote Originally Posted by UDP View Post
    Ask him an easily identifiable answer.
    - hold up 3 fingers, and ask him how many you are holding up. It doesn't matter which guard you ask. If he is the truth teller, he will answer correctly, and then he will answer the door question correctly. If he is the liar, then take the opposite door.
    Yeah that works but you are only allowed one question. So after you have established who is the truth teller and who is the liar your buggered

    I hate these things
    ENFp (Unsure of Subtype)

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    One question? I missed that.



    Don't ask any questions, and just start beating up one of the guards until he tells you the answer.

    Go into Chuck Norris mode.

    Stare down the guards until they confess everything.


    OR, push one guard down one path, and the other guard down the other, and then see what happens.
    Pre-2013 post are written with incomplete understanding.

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    Quote Originally Posted by meatburger View Post
    I dont think that one quite works

    D1
    Liar
    Life Door

    D2
    Truth teller
    Death Door

    Liar: "If I take the path behind the liar, will I die?" - Yes
    Truth teller: "If I take the path behind the liar, will I die?" - No

    So it seems your no closer to knowing which is the right door.
    The premise is is that whoever says "Yes", their door is safe, regardless if it's the liar or the truth-teller.

    Whoever says "No" the other person's door is safe.

    (Took three edits to get the right explanation down, but damn it, I did it)
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    lol, tough crowd you people... I'll say the answer to both later, but it's not really a lateral thinking type problem. Everything is there. The answer to the second one is really simple. I'm guessing this thread is not going to last very long haha. I like these type of questions though...

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    Creepy-Diana

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    Not really a puzzle but I took great pleasure in solving this.

    http://drunkmenworkhere.org/170

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    http://www.deathball.net/notpron/

    I found this a few years ago... very interesting and at time tough puzzles/riddles.
    INFj

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    Creepy-Diana

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    edit: Yeah that does check out. Sorry to waste your time lol..
    Last edited by meatburger; 03-22-2008 at 01:36 AM.
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    Quote Originally Posted by Diana View Post
    No, it works. I explained how. Either way you know what door to take.

    Let me try to explain again, maybe I can explain better this time. . .

    Scenario 1: Liar stands in front of correct path
    Scenario 2: Truth-teller stands in front of correct path
    Scenario 3: Liar stands in front of death path
    Scenario 4: Truth-teller stands in front of death path

    Question: If I take the path behind the liar, will I die?

    Scenario 1: Ask liar = Answer of Yes.
    Scenario 2: Ask truth-teller = Answer of Yes.

    Either way you know to take the path behind the person you've just asked the question. Whether they are the liar or the truth-teller you are safe.

    Scenario 3: Ask liar = Answer of No.
    Scenario 4: Ask truth-teller = Answer of No.

    Either way you know to take the path behind the other person, not the one you asked. Whether they are the liar or the truth-teller their path is not the safe one.

    So, with the one question you know which path to take.
    That works, but another answer to the problem is to ask one guard "if you were the other guard, which door would you say is the one to choose?" The only thing you need to do is choose the other door instead of what either guard points to.

    The answer to the second problem is to have both drivers switch cars. Since they each want their cars to win, which are now being driven by the other driver, they will now try to reach the finish line first so as to win the race by having their car be last.


    Quote Originally Posted by Diana View Post
    Facts:

    1: There are 5 houses in 5 different colours.
    2: In each house lives a person with a different nationality.
    3: These 5 owners drink a certain beverage, smoke a certain brand of cigar and keep a certain pet.
    4: No owners have the same pet, smoke the same brand of cigar or drink the same drink.



    From the following information, can you determine WHO KEEPS FISH?
    1: The Brit lives in a red house.
    2: The Swede keeps dogs as pets.
    3: The Dane drinks tea.
    4: The green house is on the left of the white house.
    5: The green house owner drinks coffee.
    6: The person who smokes Pall Mall rears birds.
    7: The owner of the yellow house smokes Dunhill.
    8: The man living in the house right in the centre drinks milk.
    9: The Norwegian lives in the first house.
    10: The man who smokes Blend lives next to the one who keeps cats.
    11: The man who keeps horses lives next to the man who smokes Dunhill.
    12: The owner who smokes Blue Master drinks beer.
    13: The German smokes Prince.
    14: The Norwegian lives next to the blue house.
    15: The man who smokes Blend has a neighbour who drinks water.
    This can be solved methodically by using that grid they use for logic problems like this one. Since there are five variables you would use a certain number of 5x5 squares, but I've never solved one with so many variables though... This one would give a headache for sure

    tereg: http://www.deathball.net/notpron/

    I found this a few years ago... very interesting and at time tough puzzles/riddles.
    The link didn't work for me. I like riddles though.

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    Quote Originally Posted by Sereno View Post
    That works, but another answer to the problem is to ask one guard "if you were the other guard, which door would you say is the one to choose?" The only thing you need to do is choose the other door instead of what either guard points to.
    Yeah that was the solution ive heard before
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    Creepy-Diana

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    I'm not a fan of these sorts of things. I usually want to hurt someone after about 2 minutes.

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    Quote Originally Posted by Sereno View Post
    The link didn't work for me. I like riddles though.
    I just tried the link again just now, and it seems to be working now.

    http://www.deathball.net/notpron
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    Quote Originally Posted by Diana View Post
    Here's another:

    You're in jail awaiting execution, and the guard brings you 10 pills. Nine of them will instantly kill you. You have one chance to save yourself. If you choose the non-poison pill you can leave free, otherwise you die. He hands you a scale (one of those ones where you can put objects on one side or the other and balance them) and tells you that the one safe pill is either heavier or lighter than the other pills. You can only use the scale 3 times. How do you determine which is the one safe pill?


    I had a go at this one. Writing it out for me would actually be a nightmare, it would probablly take me a week. I made pictures in paint (i think it works?)



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    Quote Originally Posted by tereg View Post
    I just tried the link again just now, and it seems to be working now.

    http://www.deathball.net/notpron
    Now it works, I've always liked doing this type of puzzle things.

    Quote Originally Posted by Diana View Post
    Here's another:

    You're in jail awaiting execution, and the guard brings you 10 pills. Nine of them will instantly kill you. You have one chance to save yourself. If you choose the non-poison pill you can leave free, otherwise you die. He hands you a scale (one of those ones where you can put objects on one side or the other and balance them) and tells you that the one safe pill is either heavier or lighter than the other pills. You can only use the scale 3 times. How do you determine which is the one safe pill?
    I think this is the answer: (Let's say good pill is heavier)

    Case A:
    3 pills on each side, 4 not on scale.
    If both sets balance out, put 2 pills that were outside on each side of scale.
    Take the heavier set (removing the lighter set) and divide on both sides of scale, and get the heavier one.

    Case B:
    3 pills on each side, 4 not on scale.
    If both sets don't balance out, discard the 4 not on scale.
    Take the heavier set of 3 (discarding the lighter one) and take 2 pills, putting one on each side.
    If they balance out, the one not on the scale is the pill. If they don't balance out, just take the heavier one.

    I don't know if this is what meatburger had too...

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