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From: wws@whuxlm.UUCP (Stoll W William)
Newsgroups: net.puzzle
Subject: x to the x to the x ...
Message-ID: <748@whuxlm.UUCP>
Date: Wed, 24-Apr-85 09:47:34 EST
Article-I.D.: whuxlm.748
Posted: Wed Apr 24 09:47:34 1985
Date-Received: Thu, 25-Apr-85 03:46:08 EST
Distribution: net
Organization: AT&T Bell Laboratories, Whippany
Lines: 11

This one may be old, it's from an old MAA test.

x^x^x^x... = 2

the x's go on forever and the carots mean "power of", not "exclusive OR".
What is the value of x?

By the way, I had to look up the answer the first time I saw this --
Did anybody get it without cheating?

Bill Stoll, ..!whuxlm!wws