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Impossible Squares - Numberphile
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A Number Sequence with Everything - Numberphile
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Superpermutations: the maths problem solved by 4chan
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An Integration Conundrum - Numberphile
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Amazing Graphs - Numberphile
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Avoid the Collatz Conjecture at All Costs!
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Stones on an Infinite Chessboard - Numberphile
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