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Shortest solution (so far) that keeps to the spirit of the challenge. Code is also easy to read.
Another short solution that keeps to the spirit of the challenge.
Remove all the consonants
Rotate a Matrix
Is it a number?
Calculate area of sector
Spot the First Occurrence of 5
Lights Out 4 - 5x5, 8 moves
Stress-Strain Properties - 6
Lights Out 14 - 5x5, four stages, x moves
Divisible by 7
Radiation Heat Transfer — View Factors (4)
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