Write a function that will multiply every prime number in the array or matrix by two, leaving all other numbers the same, and return that de-primed array or matrix. One will be treated as prime in this problem.
One in not prime!!!
And therefore should not become de-primed.
Return the largest number that is adjacent to a zero
Counting in Finnish
Project Euler: Problem 1, Multiples of 3 and 5
Cycling — Critical Power
Pattern Recognition 2 - Known Unit Length, Various Array Length (including cell arrays)
Pattern Recognition 3 - Variable Unit and Array Length (including cell arrays)
Lights Out 13 - 5x5, three stages, x moves
Rule of mixtures (composites) - lower and upper bounds
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