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#mathpuzzles

2 posts

  • @math_stackexchange Last non-zero digit of $((2026)!)!)!$ #Mathematics #NumberTheory #MathPuzzles

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    Oct 9, 2026

  • @math_stackexchange For any multiple of $37$, why does reversing it and interleaving it with zeros produce a multiple of $37$? #Mathematics #NumberTheory #MathPuzzles

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    Mar 28, 2024