Thank you, Dave -- this is it! (rest in peace, MJ) Best, É. -----Message d'origine----- De : math-fun-bounces@mailman.xmission.com [mailto:math-fun-bounces@mailman.xmission.com] De la part de Dave Blackston Envoyé : jeudi 25 février 2010 18:53 À : math-fun Objet : Re: [math-fun] What is the name of [mod 9 digitsum] I've seen it referred to as a "digital root" http://en.wikipedia.org/wiki/Digital_root Dave On Thu, Feb 25, 2010 at 9:29 AM, Eric Angelini <Eric.Angelini@kntv.be> wrote:
Hello Math-Fun, is there a name for this operation :
- start with 178 for instance; - add the digits: 1+7+8 => 16 - add the digits again: 1+6 => 7
Does the operation going from 178 to 7 have a name (other than "modulus 9 digitsum")?
Thank you, Best, É.
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