Mathematicians and hobbyists have had a half-century of fun exploring the 43 billion billion permutations of Erno Rubik’s creation. “My method was understanding,” Erno Rubik said of the iconic twisty ...
Having children means being a puzzle-solver in ways big and small. By Samantha Mann Puzzling, to me, has always been an activity for people who lack legitimate hobbies. The thought of assembling 500 ...
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