Write a function that calculates the ratio between the sum of the prime numbers lower or equal than x, and the sum of the non-prime numbers lower than x.
test case #2 is not correct.
Which doors are open?
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Generate N equally spaced intervals between -L and L
Returning a "greater than" vector
Matlab Basics - Rounding III
Ratio between sum of primes and sum of factors
Alternate list of elements
Double the next!
Get the mean digit
Check if is a square
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