Erno Rubik, the creator of the puzzle, solves a Rubik's cube as he poses during the world's largest Rubik's Cube championship in Aubervilliers, near Paris, France, July 15, 2017. (Photo/Agencies)
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Erno Rubik, the creator of the puzzle, solves a Rubik's cube as he poses during the world's largest Rubik's Cube championship in Aubervilliers, near Paris, France, July 15, 2017. (Photo/Agencies)