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Newsgroups: alt.math.recreational, rec.puzzles
From: Ted Schuerzinger <fe...@hughes.spam>
Date: Mon, 5 Dec 2011 09:24:20 -0500
Local: Mon, Dec 5 2011 9:24 am
Subject: Re: Are these numbers known?
On Mon, 5 Dec 2011 13:13:43 +0000 (UTC), Willem wrote:
It looks to me as though > No idea, but it seems to hinge on there being no carry in the > multiplications, so one would guess it stops after a while. > Perhaps there are outliers that don't depend on no carry. 1 [insert arbitray number of 0's] 2 and 1 [insert arbitray number of 0's] 3 won't have any carries:
(10^n + 2) ^ 2 = 10^2n + 4 * 10^n + 4
Those should be the reverse of each other.
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