minus-square@testfactorlink9•1 day agohttps://brilliant.org/wiki/proof-of-divisibility-rules/ The 7 and 13 rules are pretty cool too.
minus-square@GrammarPolicelink3•edit-21 day agoThis is insane stuff. 13 is truly mesmerizing. Although I don’t think I’m sharp enough for the proofs. Even the divisibility by 2 proof looks hellish.
https://brilliant.org/wiki/proof-of-divisibility-rules/
The 7 and 13 rules are pretty cool too.
This is insane stuff. 13 is truly mesmerizing. Although I don’t think I’m sharp enough for the proofs. Even the divisibility by 2 proof looks hellish.