Ultimate Tic-Tac-Toe – Math with Bad Drawings

Once at a picnic, I saw mathematicians crowding around the last game I would have expected: Tic-tac-toe.

Ultimate Tic Tac Toe: math game

Ultimate Tic-Tac-Toe – Math with Bad Drawings

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Math Games with Bad Drawings by Ben Orlin (ebook)

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Math with Bad Drawings

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Ultimate Tic-Tac-Toe – Math with Bad Drawings

Math Games with Bad Drawings by Ben Orlin — Kickstarter

Ultimate tic-tac-toe - Wikipedia

A beautifully simple game: 1. - Math With Bad Drawings