RSS and ATOM Feed Boosting Engine

A friend of mine is interviewing for a job. One of the interview questions got me thinking, just wanted some feedback. There are 2 non-negative integers: i and j. Given the following equation, find an (optimal) solution to iterate over i and j in such a way that the output is sorted. 2^i * 5^j So... [[ This is a content summary only. Visit my website for full links, other content, and more! ]] ...

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  Background: I'm a hiring manager for sysadmins, tech support people, and the occasional front-line manager thereof, and have worked in and interviewed for those positions most of my career, except for a brief stint driving trains -- of which the interview phase was surprisingly valuable... [[ This is a content summary only. Visit my website for full links, other content, and more! ]]