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.
Find the numeric mean of the prime numbers in a matrix.
Back to basics 4 - Search Path
Mirror Image matrix across anti-diagonal
05 - Vector Equations 3
find the surface area of a cube
Get the value 100
Approximate the inverse tangent by power series
Say type of roots in quadratic equation
Alternating 1´s and 0´s in a matrix
Get the mean digit
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