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 Niners (Posted on 2002-10-23)
The set of numbers {9, 99, 999, 9999, ...} has some interesting properties. One of these has to do with factorization. Take any number n that isn't divisible by 2 or by 5. You will be able to find at least one number in the set that is divisible by n. Furthermore, you won't need to look beyond the first n numbers in the set.

Prove it.

 See The Solution Submitted by levik Rating: 4.2500 (8 votes)

 Subject Author Date re: Here is my proof spinoza 2003-06-01 03:10:02 Here is my proof Brian Smith 2003-05-08 06:26:33 re(2): Need some math theory help over here Gamer 2003-05-03 16:44:52 re: Need some math theory help over here Cory Taylor 2003-03-06 04:57:23 Need some math theory help over here Bryan 2003-03-05 10:37:34 Thanks to Euler Vikram 2002-12-31 07:43:12 niners martin 2002-12-07 14:36:36 re(4): Cheradenine 2002-10-24 03:00:04 re(4): TomM 2002-10-24 01:42:03 re(3): TomM 2002-10-24 01:32:40 re(2): Cheradenine 2002-10-23 22:56:37 re: levik 2002-10-23 17:27:24 Hmmm... Dulanjana 2002-10-23 14:54:29 No Subject Cheradenine 2002-10-23 05:43:07 Firstly levik 2002-10-23 04:56:42

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