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.
pressure to dB?
03 - Matrix Variables 5
Times 3 problem
Draw a 'N'!
Check if is a square
Say type of roots in quadratic equation
Sum of a geometric series
Approximate the inverse tangent by power series
Double the next!
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