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.
Back to basics 8 - Matrix Diagonals
07 - Common functions and indexing 3
Evaluating a polynomial
Prime number removal
Get the mean digit
Alternating 1´s and 0´s in a matrix
Approximate the inverse tangent by power series
Get the value 100
Double the next!
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