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 Reverse and Differ (Posted on 2005-02-01)
Start with any 3-digit number which is not a palindrome.
Reverse the digits and find the positive difference between the two numbers.
Using this result, continue this process until the difference is a number with fewer than three digits.

1) What are the only possible results? Prove it. 2) What is the greatest number of steps any number could take to terminate (and which numbers are these?)

 See The Solution Submitted by Jer Rating: 2.0000 (2 votes)

Comments: ( You must be logged in to post comments.)
 Subject Author Date re(4): Solution Jer 2018-03-25 14:01:08 re(3): Solution Ady TZIDON 2013-03-29 19:26:23 re(2): Solution Charlie 2013-03-29 11:42:21 re: Solution Ady TZIDON 2013-03-29 08:52:01 Some thoughts Sing4TheDay 2005-02-02 15:21:53 Solution e.g. 2005-02-01 18:28:11
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