On learning how to solve the Rubik's Cube | Class Teaching
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The Thrill of Cognition - The New York Times
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Amazon.com: Rubik's Cube, Original 3x3 Puzzle Brain Teaser Fidget Toy with Removable Interchangeable Mod Stickers to Customize, for Adults & Kids Ages 8 and up : Toys & Games
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God's Number Revealed: 20 Moves Proven Enough to Solve Any Rubik's Cube Position