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.
Remove all the consonants
Returning a "greater than" vector
Element by element multiplication of two vectors
Is it column vector?
Check if is a square
Ratio between sum of primes and sum of factors
Get the mean digit
Approximate the inverse tangent by power series
Get the value 100
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