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Knot brain teaser

  1. Jul 4, 2005 #1
    Take a long rectangular piece of paper, and tie a simple knot. Carefully pull it into place and the location of the knot will be a perfect pentagon. Why?

    (Not a brain teaser, I really don't know the answer.)
    Last edited by a moderator: Jul 4, 2005
  2. jcsd
  3. Jul 4, 2005 #2


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    Gold Member

    Last edited by a moderator: May 2, 2017
  4. Jul 5, 2005 #3
    No, in fact, I did not.
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