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Gas Electricity Water puzzle can't be done? - Page 2 — Parallax Forums

Gas Electricity Water puzzle can't be done?

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  • potatoheadpotatohead Posts: 10,261
    edited 2012-04-16 10:07
    Somebody mentioned torus. Roll the paper into a cylinder, then draw all your lines.
  • Phil Pilgrim (PhiPi)Phil Pilgrim (PhiPi) Posts: 23,514
    edited 2012-04-16 10:18
    potatohead wrote:
    Somebody mentioned torus. Roll the paper into a cylinder, then draw all your lines.
    You'll still have to use the back of the paper, going over the edge, which is equivalent to going through the donut hole.

    I wonder if it's solvable on a Moebius loop without going over the edge.

    -Phil
  • GordonMcCombGordonMcComb Posts: 3,366
    edited 2012-04-16 10:27
    And besides, who said the puzzle is on paper. The way I usually see it it's on a white magnetic board. People draw the lines with dry erase markers. For management seminars, they get 2-4 people per group, and video tape the interaction.

    HOW people try to solve this tells a lot about their personality. I'm pretty sure a variation of it is on the random tests for the Google employee application.

    -- Gordon
  • potatoheadpotatohead Posts: 10,261
    edited 2012-04-16 12:44
    You are right Phil!

    I love topology discussions. The subject is so difficult to visualize... I think I'll put this one on the white board at work. Would be good entertainment, and deffo some indicator of how people think.
  • Mark_TMark_T Posts: 1,981
    edited 2012-04-16 16:10
    GordonMcComb wrote: »
    HOW people try to solve this tells a lot about their personality. I'm pretty sure a variation of it is on the random tests for the Google employee application.

    -- Gordon

    Or whether they've read Martin Gardner...
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