Please add more cases to the test suite, or else it is trivial to solve this problem.
Rafael is right and since you made this into a badge problem it is even more essential to fix this
Find the numeric mean of the prime numbers in a matrix.
Increment a number, given its digits
Back to basics 23 - Triangular matrix
Change the sign of even index entries of the reversed vector
02 - Vector Variables 4
Find Logic 24
Find Logic 15
Find Logic 29
Find Logic 18
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