Bob is reading a 500 page book, with odd numbered pages on the left, and even numbered pages on the right. Multiple times in the book, the sum of the digits of the two opened pages are 18. Find the sum of the page numbers of the last time this occurs.

(In reply to Analytic solution by Larry)

typo: 419 should be 819

Posted by Charlie on 2023-08-30 07:49:18