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I knew those already. Studied those as curiosity on Algebra class. Up to 11, but there are rules for up to 17, as far as I know. By the way, took me three secon
by Novash 19y ago
I knew those already. Studied those as curiosity on Algebra class. Up to 11, but there are rules for up to 17, as far as I know. By the way, took me three seconds to figure it was divisible by 7, using multiplication properties.
- eru 19y agoActually you can construct a finite automate (= a rule) - that operates on the digits and checks for divisibility - for any fixed number.