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 common elements in matrix rows
Project Euler: Problem 6, Natural numbers, squares and sums.
Who knows the last digit of pi?
03 - Matrix Variables 1
Equation Times (of the day)
Divisible by n, Truncated-number Divisors
Divisible by 2
Rule of mixtures (composites) - lower and upper bounds
Divisible by 14
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