test case #2 is not correct.
The problem description should be change to "and the sum of non-prime numbers up to the greatest prime lower than x".
Thank you for that clarification, @Rafael S.T. Vieira. The problem title and description have been improved, along with added test cases.
Find the alphabetic word product
Determine Whether an array is empty
Basics: 'Find the eigenvalues of given matrix
Return 'on' or 'off'
Ratio between sum of primes and sum of factors
Double the next!
Check if is a square
Alternating 1´s and 0´s in a matrix
Get the value 100
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