Interesting problem but tests are too tricky.
I am not sure that a list of equal numbers qualifies as a series. Would it be a geometric or an arithmetic series?
Find the numeric mean of the prime numbers in a matrix.
Reverse the vector
Getting the indices from a matrice
frame of the matrix
possible ways through matrix
Generate this matrix
Diagonal of a Spiral Matrix
row-th maximum row elements
longest common semi-substring
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