Brad Fitzpatrick (brad) wrote,
Brad Fitzpatrick

Ugh.... "Use modular arithmetic and induction on the definitions of value and digitsum to prove the 'Rule of 3' which says that a number is divisible by 3 if and only if its decimal digits sum to a multiple of 3."

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    Posting from the iPhone app. Maybe I'm unblocked now.

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    Long time no see. How's my baby doing?

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