Re: "Elementary" number theory problem
From: Gerry Myerson (gerry_at_maths.mq.edi.ai.i2u4email)
Date: 07/20/04
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Date: Tue, 20 Jul 2004 10:17:00 +1000
In article <cdg6gf$nsh@odah37.prod.google.com>,
"Van Jacques" <calccurve-test23@yahoo.com> wrote:
> Consider an integer m < 10^5 with 4 distinct digits. Let k be
> the number obtained by putting the digits in decreasing
> order, and l the number obtained by putting the digits in increasing
> order. Let m' = k - l. Repeat with m' in place of m, and continue.
> What happens? Why?
I recommend searching for Kaprekar.
-- Gerry Myerson (gerry@maths.mq.edi.ai) (i -> u for email)
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