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.
06 - Matrix Equations 1
Min of a Matrix
Convert given decimal number to binary number.
Reverse the Matrix
Sum of a geometric series
Ratio between sum of primes and sum of factors
Approximate the inverse tangent by power series
Check if is a square
Get the mean digit
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