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 to basics 8 - Matrix Diagonals
Find out missing number from a vector of 9 elements
05 - Vector Equations 3
Is My Wife Wrong?
Matrix Ax=B problem
More Simple String Concatenation
Sum two matrices
Replace 0 indices in array with 1's
Matrix Generation from Vector Multiplication
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