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Brain teaser

Discussion in 'Members' Lounge' started by Capt. Orygun, Jun 9, 2004.

  1. Capt. Orygun

    Capt. Orygun Win the Day

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    it took me like a half hour to figure this out


    |h| |h| |h|





    |E| |W| |G|


    The three H boxes are houses, the three below them are electricity, Water, and Gas terminals. Each house requires all of them. Draw lines connecting these houses with the rescources they need. Each line can only go to only location (no junctionbox type stuff, there should be 9 lines total). Here's the kicker, no line can youch any other line, no overlapping, nothing. Be the first to PM me the awnser if you figure it out and if your right I'll delcare you the winner. Grand prize? Me telling everyone else here to :worthy: 2U :D
     
  2. micah

    micah Senior Member

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    there has to be 9 lines?

    couldnt you do it with just 5?
    like wiring 3 speakers up to an amp in a series?
     
  3. caffeind

    caffeind Senior Member

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    that drove me insane....i think my mom tried to make me do it.

    pm me with the answer.
     
  4. micah

    micah Senior Member

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    well i did it with 9, not sure if its what your looking for :p
     
  5. K2e2vin

    K2e2vin Senior Member

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    do the lines have to be straight???
     
  6. La_Pieuvre

    La_Pieuvre Senior Member

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    |h|_____|h|______|h|
    |
    |
    |
    |E|_____|W|______|G|

    Would this work?

    :EDIT: Nevermind.... I didn't see the part about the 9 lines
     
  7. ndogg

    ndogg Member

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    dont spend too much time on this becaues it is provably impossible to do on a Euclidean plane. as well as on a peice of paper.
     
  8. La_Pieuvre

    La_Pieuvre Senior Member

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    Bingo! I got it... Have to think in 3D.

    or do I? damn it!
     
  9. La_Pieuvre

    La_Pieuvre Senior Member

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    [​IMG]

    this was re-arranged to simplify the visual. But it would work the same with your layout
     
  10. ndogg

    ndogg Member

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    you need to go 3-d, use a special 2-d object called a torus or bring the lines though the houses.
     
  11. Capt. Orygun

    Capt. Orygun Win the Day

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    no winners yet, let me restate the rules

    the lines you use must not cross/touch each other
    each house must have it's own line from each of the rescources
    and it has nothing to do with 3D
     
  12. jamesA

    jamesA Well known pissed off telephone guy VIP

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    Ita ll works out for me except one line... the last line for Elec... bastards...


    Too bad you cant cross lines for the electricity, houses are usually in parallel anyway. :p
     
  13. jamesA

    jamesA Well known pissed off telephone guy VIP

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    If it's really set up like that, it can't be done. Theres always just that one last line that fucks me over.
     
  14. phunky.buddha

    phunky.buddha Admin with a big stick Admin VIP

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    One of the lines has to go under a house.

    That's still a 3D solution though- and you said it had nothing to do with 3D. :p

    [​IMG]
     
  15. jamesA

    jamesA Well known pissed off telephone guy VIP

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    ah so he added bullshit rules so that no one could do it. Thanks I wasted like 5 pieces of paper drawing lines all over the places.
     
  16. SolPWR

    SolPWR Senior Member

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    hmmm impossible!

    now im fustrated and I have pen marks all over my monitor :angry:
     
  17. phunky.buddha

    phunky.buddha Admin with a big stick Admin VIP

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    Well, technically the lines don't cross- just draw the houses as boxes and not dots, then the solution becomes obvious. You do still have to go under a house though, so it's still a 3D solution.
     
  18. ndogg

    ndogg Member

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    just bring the line through the house not under it. then its 2-d. its a stupid trick question any way you look at it. if you look at it with graph theory (wich i have done) there is no solution. unless you use a special 2-d surface called a torus:

    [​IMG]

    edit: do i win?

    Here is a real brain teaser with a real solution. it is a little tricky but it CAN BE DONE without any bullshit tricks:

    you have 8 identical coins. and a balance (where you can compare weights). you are allowed to use the balance 3 times only. one of the coins is a different weight than the other 7. wich one is it and is it heavier or lighter?

    this question was asked to a friend of mine during a microsoft interview.
     
  19. Slo86GT

    Slo86GT Super Moderator

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    Sitting here, laughing at these solutions, I've come to the conclusion...


    My friends on Hondaswap.com kick ass. ;)
     
  20. Slo86GT

    Slo86GT Super Moderator

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    There is no way to tell from the information given. :p

    BUT, the fastest way to find out which, and if heavier or lighter is listed here.

    Weight 4 and 4. Which side is heavier?

    Remove 1 of each side.

    Weigh 3 and 3. Which side is heavier? If same, then the coins you removed from the previous step were different from each other. Weigh one against one of the remaining 6 to find the oddball.

    If the 3 and 3 are still different, remove one from each side and weigh again.

    Repeat til you find the oddball.
     
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