The Phone Number puzzle
Part of a monthly series of puzzles: https://momath.org/mindbenders/
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Tie random ends: How many loops?
Recent puzzle solutions on Patreon: https://members.3blue1brown.com/posts/158885046?pr=true
Covering 10 points, a surprisingly tricky puzzle.
Made as part of a monthly series of puzzles for the 2026 Year of Math.