geometry - Is it possible to draw this picture without lifting the pen? - Mathematics Stack Exchange
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Can you draw this diagram without lifting your pencil or drawing over the same line twice? Because, I can't and I can't find anybody, anywhere (not even Google) who can. Please, give
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Request] How can I draw this geometric shape without retracing any lines or lifting my pencil? : r/theydidthemath
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geometry - Is it possible to draw this picture without lifting the pen? - Mathematics Stack Exchange
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Do this without lifting your pencil - The Hindu
graph theory - Draw this shape - no double lines, no lifting pen? Impossible!? - Mathematics Stack Exchange
How do you draw this without lifting the pencil or reusing a line? : r/puzzles
Fun for Designers: Three Quick "Can You Draw This Without Lifting Your Pencil" Tests - Core77
Ashish Khare on Twitter: "Puzzle from World Puzzle Championship 2017 Ideally, should be tried without pen and paper..... https://t.co/u0sMJ9f1NO" / Twitter