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• 41 Five Slitherlinks
• 35 Is any mathematican more famous for their conjecture(s) than their theorem(s)?
• 30 Fake proofs using matrices
• 26 Collatz Conjecture (3n+1) variant
• 18 How to solve this series: $\sum_{k=0}^{2n+1} (-1)^kk $
• 12 Can the product of two nonsymmetric matrices be symmetric?
• 8 Infinite group with finitely many conjugacy classes of cardinality $n$.
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