reply to post by chiron613
chiron613, thank you for participating! Your post is really interesting in general and awakens totally new perspectives within me.
Originally posted by chiron613
One consequence of your discovery is that any number, whose digits sum to 9 (or a multiple of 9) is also divisible by 9. So 153 is divisible by nine,
as is 340101, and so on. Just add up the digits.
Yeah, I tested with few numbers from small to big ones and it really seems to be the case.
Originally posted by chiron613
Divide 1234567 by 9 and you get 137174, with a remainder of 1.
Then, you can divide 12345678 with nine and have round number 1371742
Originally posted by chiron613
I'm not sure how useful this is in daily life, but it is the root of many "number magic" tricks. For example, the trick might be for you to pick
some number, add something to it, multiply, divide, do whatever, and "magically" you'll either get your number back, or you'll get 9. Some of
these tricks can be quite puzzling if you don't know how 9 figures into it.
There's probably not much use for layman in daily life, but from perspective of knowledge they are interesting, and probably very useful, as it seems
to be the case with
Marko Rodin and his coil (from my behalf, credit goes for valhala bringing this
into my knowledge!).
Again chiron613, thank you for posting - you made really a worthwhile post in my opinion!
Sincerely,
-v
[edit on 1-11-2009 by v01i0]