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.
05 - Vector Equations 1
Find out total non zero element of matrix
multiply by three
Determine the mean of matrix
Say type of roots in quadratic equation
Sum of a geometric series
Double the next!
Get the mean digit
Check if is a square
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