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From: brian@digi-g.UUCP (Brian Westley)
Newsgroups: net.math
Subject: Re: Wanted: Solution to kids puzzle
Message-ID: <190@digi-g.UUCP>
Date: Mon, 23-Jul-84 10:59:26 EDT
Article-I.D.: digi-g.190
Posted: Mon Jul 23 10:59:26 1984
Date-Received: Fri, 27-Jul-84 02:16:56 EDT
References: <6100006@hp-pcd.UUCP>, <3388@brl-tgr.ARPA>
Organization: DigiGraphic Systems Corp., Mpls.  MN
Lines: 12

There is a 50% chance that a random order of the 1-15 tiles will be
solvable.  This has to do with the parity of the tiles.  A very
devious variant is as follows:  instead of numbers, the tiles read -
RATE
YOUR
MIND
PAL
with RATE YOUR in red tiles and MIND PAL in white.  Show this to your
victim, and scramble the letters - but, put the 'R' in YOUR in the
upper left hand corner as you mix them up!  He will naturally leave
it there to spell RATE - but the parity is wrong!  The best he can do
is RATE YOUR MIND PLA... (from one of Martin Gardner's many books)