The 60 Year Quest for the Perfect Sofa
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Defining Math in One Sentence
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Why You Can't Bring Checkerboards to Math Exams
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The Moving Sofa Problem - Numberphile
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You'll Never Guess the Optimal Strategy
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The Subfactorial is Hilarious
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Stockfish Just Solved Chess
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Acabei de resolver um problema de matemática não resolvido?
12:53