You may have seen this puzzle where you have to connect 9 dots with 4 straight lines without lifting the pen from the paper or going back on yourself — it’s a traditional ‘thinking outside the box’ puzzle. The solution is at the end of this article. If you can do the 4-line solution, try it with 3 or even 1 line! See below.
Variations
9 dots, 3 lines
9 dot…
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