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.
Number of digits in an integer
Perfect Square or not
ベクトル [1 2 3 4 5 6 7 8 9 10] の作成
Sum of the Multiplication of Vectors
Draw a 'X'!
Ratio between sum of primes and sum of factors
Sum of a geometric series
Alternate list of elements
Get the value 100
Check if is a square
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