From: utzoo!decvax!harpo!npois!alice!rhm
Newsgroups: net.math
Title: puzzle
Article-I.D.: alice.600
Posted: Thu May 27 15:42:01 1982
Received: Sat May 29 01:53:21 1982

Find a non-zero number x with the property that when you write
the number in decimal notation, then remove the right-hand digit
and add it to the left end of the number, the result is 2*x.
i.e. 214 -> 421 is close, but no cigar.