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For some integers that are not palindromes, like 91, a person can create a palindrome by repeatedly reversing the number and adding the original number to its reverse. For example, 91+19=110 . Then 110+011=121 , which is a palindrome, so 91 takes two steps to become a palindrome. Of all positive integers between 10 and 100, what is the sum of the non-palindrome integers that take exactly six steps to become palindromes?

 Dec 2, 2018
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See the answer here:  https://web2.0calc.com/questions/help-on-counting

 Dec 2, 2018

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