Problem 42701. multiple of nine?

George-Felix Leu

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Given a positive number n, return true if n is a multiple of 9 and false if not. Do not make the division and do not use functions like mod or rem.

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112 Solvers

Last Solution submitted on Feb 18, 2026

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Jean-Marie Sainthillier on 5 Jan 2016

See Problem 42411 by Grant III

George-Felix Leu on 6 Jan 2016

@Jean-Marie Sainthillier: You are right, sorry for not have checked before.
And thank you for the info, the problem-series by Grant III is very useful.

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