Check if a inputted variable is a number or a string, given a string input (i.e. '1' is 1 and thus a number, 'a' is a string).
Additional test cases have been added.
Back and Forth Rows
Reverse Run-Length Encoder
Reverse a matrix
Area of a circle
Simple Vector Addition
Matrix element wise multiplication
Matrix Ax=B problem
Automatic String Editing
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