A competitor solves a Rubik's cube as he prepares for the world's largest Rubiks Cube championship in Aubervilliers, near Paris, France, July 15, 2017. (Photo/Agencies)
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A competitor solves a Rubik's cube as he prepares for the world's largest Rubiks Cube championship in Aubervilliers, near Paris, France, July 15, 2017. (Photo/Agencies)