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truBlu · Nov 13th, 2007, 7:52 PM

I'm figuring this out more as I go along. If you enter 0, you get 9. Enter 1 and you get 8 all the way up to 8 -> 1. Enter 9 and you get 9. The process at this point is trivial. The only thing I don't understand is why you need two numbers with the same digits. I don't know what property of numbers is being used.

Nov 13th, 2007, 7:52 PM	#2
truBlu Newbie Join Date: Sep 2007 Location: New Jersey Posts: 13 Rep Power: 0	Re: A Math challenge I'm figuring this out more as I go along. If you enter 0, you get 9. Enter 1 and you get 8 all the way up to 8 -> 1. Enter 9 and you get 9. The process at this point is trivial. The only thing I don't understand is why you need two numbers with the same digits. I don't know what property of numbers is being used.