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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.
Find common elements in matrix rows
Factorize THIS, buddy
Swap the input arguments
Find the sum of the elements in the "second" diagonal
Divisible by 3
Scrabble Scores - 7
Radiation Heat Transfer — View Factors (4)
Lights Out 6 - 5x5, 13 moves
Scrabble Scores - 2
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