From - Thu Oct 15 16:29:18 1998 From: fredh@ix.netcom.com (Fred W. Helenius) Newsgroups: rec.puzzles Subject: Re: Math Puzzle Date: Wed, 14 Oct 1998 16:42:29 GMT Organization: ICGNetcom answrman@idt.net (Jeff G) wrote: >Among all 3-digit numbers in which no digit appears more than once, >there is one special trait shared by the numbers: > 195 > 265 > 498 >and ONE other 3-digit number. >(1) What is the trait? >(2) What is the 4th number which shares this trait? SPOILERS below... SPOILERS: (1) They are three-digit numbers ABC such that AB/BC = A/C, i.e., you can "cancel" the Bs. (2) The remaining number is 164: 16/64 = 1/4. -- Fred W. Helenius