Add two numbers
Find state names that start with the letter N
Check if sorted
Back to basics 21 - Matrix replicating
Sum the elements in either diagonal of a square matrix
Remove NaN ?
Matrix with different incremental runs
First non-zero element in each column
Find the elements of a matrix according to a defined property.
Remove from a 2-D matrix all the rows that contain at least one element less than or equal to 4
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