Sums with Excluded Digits
Find the sum of the elements in the "second" diagonal
Divisible by 14
Fill-a-pix - Solution Checker
Lights Out 3 - 5x5, 6 moves
Lights Out 33 - m x n x o, q stages, x moves
Rule of mixtures (composites) - weighted bound
Lights Out 10 - 5x5, with wrapping, 6 moves
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