I got tired of solving these problems. So, I just wrote a solution that works for everything.
Back to basics 26 - Keywords
Rotate input square matrix 90 degrees CCW without rot90
Right Triangle Side Lengths (Inspired by Project Euler Problem 39)
Add two numbers
Scrabble Scores - 8
Rule of mixtures (composites) - lower and upper bounds (volumes)
Fill-a-pix - Solution Checker
Stress-Strain Properties - 5
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