Very sneaky noticing this pattern in the answers.
Replace NaNs with the number that appears to its left in the row.
Right and wrong
Find the dimensions of a matrix
Divide by 4
Crop an Image
Lights Out 12 - 5x5, three stages, <7 moves
Scrabble Scores - 8
Divisible by n, prime divisors - 11, 13, 17, & 19
Divisible by 4
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