Re: "Elementary" number theory problem

From: Doug Goncz (dgoncz_at_aol.com)
Date: 07/30/04 

Date: 30 Jul 2004 22:36:51 GMT

It is a rule of thumb in accounting, I have this thanks to Gloria Newbery, a
branch manager, that if a digit transposition error exists in an account, the
amount of the error in the balance will be divisible by 9.

For example:

$1234.56 +
$2345.67 =
$3580.23

$1243.56+
$2345.67=
$3589.23

$3589.23-
$3580.23 =
$ 9.00

See?

This may be related to the reference to 18 given in Van's first post.

>From: calccurve-test23@yahoo.com (Van Jacques)

>Message-ID: <66ea3ad9.0407191505.f389716@posting.google.com>

>Message-ID: <66ea3ad9.0407191505.f389716@posting.google.com>

>5) Clearly m' and all further differences are divisible by 9.

Of course, my fellow Gypsies can intuit which way to write the transposition
for maximum profit!

Yours,

Doug Goncz ( ftp://users.aol.com/DGoncz/ )
Student member SAE for one year.
I love: Dona, Jeff, Kim, Mom, Neelix, Tasha, and Teri, alphabetically.
I drive: A double-step Thunderbolt with 657% range.