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.
Sort a list of complex numbers based on far they are from the origin.
What is the distance from point P(x,y) to the line Ax + By + C = 0?
prime test 2
Calculate the number of elements in a matrix.
Alternating 1´s and 0´s in a matrix
Alternate list of elements
Say type of roots in quadratic equation
Check if is a square
Double the next!
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