Recent content by werner7209

Cool, thanks, now I know what it is called. Should have known there's nothing new under the sun. If only I had lived a few centuries earlier :) Personally I think my method is a much simplified version though, although it regrettably obscures the mechanics behind it.

I have just stumbled upon something fascinating about addition, subtraction, multiplication and division of digitsums and was searching the net to see if someone else has already discovered this. The best I could find on this topic, was this forum, so maybe someone here can tell me, if this is...