If my over-use of str2num has in any way caused offense, I hereby beg leave to apologize.
My hat's off to you for such a solution. I'm baffled as to how to decode it (pun intended). I know that there has been a lot of furor over the use of regexp and other string-based functions, conversions, etc. to lower solution sizes for problems in general, but this problem is string-based, so I see no problem in solving it via arcane string methods.
Times 2 - START HERE
Find the palindrome
Lychrel Number Test (Inspired by Project Euler Problem 55)
Find my daddy long leg (No 's')
Scrabble Scores - 2
5 Prime Numbers
Dice roll - opposite faces
Lights Out 9 - 5x5, light-only solution? II
Pattern Recognition 1 - Known Unit Length
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