Results 1 to 6 of 6

Math Help - Logic Puzzle

  1. #1
    Junior Member
    Joined
    Nov 2005
    Posts
    43

    Logic Puzzle

    Three gods A , B , and C are called, in some order, True, False, and Random. True always speaks truly, False always speaks falsely, but whether Random speaks truly or falsely is a completely random matter.

    Your task is to determine the identities of A , B , and C by asking three yes-no questions; each question must be put to exactly one god. The gods understand English, but will answer in their own language, in which the words for yes and no are da and ja, in some order. You do not know which word means which.

    SOLUTION
    ______________________________

    http://hcs.harvard.edu/~hrp/issues/1996/Boolos.pdf
    ______________________________
    Follow Math Help Forum on Facebook and Google+

  2. #2
    Global Moderator

    Joined
    Nov 2005
    From
    New York City
    Posts
    10,616
    Thanks
    10
    The problem with liar and truth riddles is this:
    Let us assume the problem was one always says the truth and the other always says a lie then you can do the following easy trick. Ask one of them "Am I immortal?" if he will say "Yes" than he must be a lair. If he says "No
    " he must be honest. I know this is a dirty move and the riddle is not supposed to be solved like that but it works .

    I do not know if this strategy works here also, but there are a number of riddle where it does.
    Follow Math Help Forum on Facebook and Google+

  3. #3
    Junior Member
    Joined
    Nov 2005
    Posts
    43
    This strategy may be useful if adapted. However, as it is, it cannot work: (a)you don't know if you're talking to Random and (b) you don't know whether "da" or "ja" mean yes/no.
    Follow Math Help Forum on Facebook and Google+

  4. #4
    Junior Member
    Joined
    Jan 2006
    Posts
    56

    my Dog

    hy!
    interesting this puzzle i have got some clues for the solution
    i would hask 2 question to Mr stone:
    are the god using the same dialect.
    do they no something about the future, that would make a second difference whith normal human beeing , the first is that they Always say truth or Lye!
    i think i am very near hit but i don't want to ask god too sophisticated da or ja conjoncture.
    by!
    Follow Math Help Forum on Facebook and Google+

  5. #5
    Junior Member
    Joined
    Jan 2006
    Posts
    56
    Quote Originally Posted by SkyWatcher
    interesting this puzzle i have got some clues for the solution
    i think i am very near heat but i don't want to ask god too sophisticated da or ja conjoncture.
    by!
    As a mater or fact i don't care if Treadstone answers to my two questions would be da and ja, da and da ,ja and da, or ja and ja
    I just wanted to stress that this is an interresting puzzle and that it has a solution.
    my personal one involved a strategy and not less than three "clever" tricks
    clever means that "clever" people should keep them in a special place of there memory like wise mean that "wise" people should ect...
    I know that Threadstone had put a white link to a pdf stuff but personaly i cannot read it (i dont know if its a Threadstone joke or a perticularity of my computer!)
    See you i have got one more "riddle" to finish!
    Follow Math Help Forum on Facebook and Google+

  6. #6
    Junior Member
    Joined
    Nov 2005
    Posts
    43
    Mmm, I don't really understand your quesiton. Btw, the link works for me, I don't know if it works for the rest of you, and it definately is not a joke. Anyway, you can ask 3 questions, each of which must be directed to a single god. The gods all speak the same language, and "da" or "ja" is consistent, but you don't know which means "yes" and which means "no". I'll write the solution in full if the PDF file is inaccessible.
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. Logic Puzzle, can any one solve this?
    Posted in the Math Puzzles Forum
    Replies: 5
    Last Post: October 22nd 2011, 11:49 PM
  2. Logic Puzzle
    Posted in the Math Puzzles Forum
    Replies: 1
    Last Post: October 12th 2010, 07:39 PM
  3. Logic Puzzle
    Posted in the Math Challenge Problems Forum
    Replies: 3
    Last Post: August 10th 2009, 02:00 PM
  4. Logic puzzle for tomorrow :-(
    Posted in the Math Topics Forum
    Replies: 3
    Last Post: January 26th 2009, 10:39 AM
  5. [SOLVED] Logic Puzzle Help
    Posted in the Math Challenge Problems Forum
    Replies: 3
    Last Post: November 23rd 2006, 10:40 PM

Search Tags


/mathhelpforum @mathhelpforum