What I saw on the web on 2024.11.21

Nov. 22nd, 2024 05:55 am
reblogarythm: (thursday)
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  1. I cracked the divisibility code.
    by Matt Parker
    https://www.youtube.com/watch?v=6pLz8wEQYkA
    as per the comments, i'm fond of the 1001 divisbility test, which tests 7, 11, and 13 at the same time, and essentially lets you play with your number in blocks of 3 digits
    via rss
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