KöMaL 2017 K547
Peter thought of a positive integer. He added the number containing the same digits in reverse order. (For example, starting with 26 he added 62 to it, or starting with 530 he added 35.) He obtained a three-digit number that only contained digits of 6 and/or 9. What may have been Peter's original number?
Official text KöMaL. Quoted with source.
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