this is the commented version of my previous entry (solution 181910)
this is my original submission modified for ease of reading
whoops, didn't see your thing about "easy to understand code."
Hackathon: the beginnings
Project Euler: Problem 10, Sum of Primes
Simple equation: Annual salary
Dimensions of a rectangle
Implement simple rotation cypher
Is this a valid Tic Tac Toe State?
Poker Series 07: IsTwoPair
Get ranking of a combination
Choose the best fitting dominoes
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