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The trick for me was to move one triangle around over the other until only three coins didn't overlap.

• cardanome 5y ago
  I think am misunderstanding the problem because I have convinced myself that it can not have a valid solution. I had one fake AHA moment and but then it was gone again. Not sure what that says about me. Edit and spoiler warning: Looked up the solution and I think the picture is misleading. It implies that pyramid staying on same height.
  • isp 5y ago
    The background of paper with lines is very misleading - because it implies that translation of the pyramid is forbidden, when this translation is the key.
    • mental1896 5y ago
      I agree, although it's not the lines for me but the boundary of the page itself.
      • deleted 5y ago
        [deleted]
  • deleted 5y ago
    [deleted]
  • odonnellryan 5y ago
    There is always some kind of consideration like that for these types of trick problems.