Her name is Cheryl.

Computer Science Level 3

I have an integer (in decimal representation) such that if I reverse its digits and add them up, I will get a new integer. I repeat this process until the resulting integer is a palindrome. We will denote an integer as a near-symmetric number if after twenty-five iterations, the resulting integer is still not a palindrome. What is the smallest positive near-symmetric number?

Details and assumptions

  • A palindrome is a number that remains the same when its digits are reversed.

  • As an explicit example, consider the integer to be \(49\). The resulting number will be \(49 + 94 = 143 \). Repeat: \(143 + 341 = 484 \), which is a palindrome (after \(2 < 25 \) iterations). Thus \(49\) is not a near-symmetric number.

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Pi Han Goh by Pi Han Goh
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