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From: greil@guug.guug.de (Anton Greil)
Newsgroups: comp.databases,rec.puzzles
Subject: SQL puzzle
Keywords: SQL, recreation
Message-ID: <125@guug.guug.de>
Date: 2 Aug 90 11:55:33 GMT
Sender: greil@guug.guug.de (Anton Greil)
Organization: GUUG e.V., Munich, W.-Germany
Lines: 22



Can you solve the following puzzle by SQL?

"Here is an arithmetical problem which is belonging to the  great
classics.   Two  natural  numbers were selected which are greater
than 1 and less than 100. The sum of these two numbers  was  told
Mr. S, the product of the numbers was told Mr. P.

Each of the two men doesn't know the number of the other.  Mr.  P
rings up Mr. S:

P: I can't find the two numbers.
S: I knew, that you would not succeed.
P: Oh ... But now, I know them!
S: In this case, I know them too."

(from: Jaques ARSAC: Jeux et casse-tete a programmer, Paris 1985
                     Computer Denkspiele, selbst programmiert,
                     Muenchen 1987)

There is just one solution for this problem!