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.
Find all elements less than 0 or greater than 10 and replace them with NaN
Test for balanced parentheses
Divisible by 16
Scrabble Scores - 8
Scrabble Scores - 2
Lights Out 6 - 5x5, 13 moves
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