find the first elements of a column matrix
This would be better as "find the nth element of an array." Also, a column matrix doesn't exist. Perhaps you meant column vector, though the variables in your test cases are row vectors.
The Hitchhiker's Guide to MATLAB
prime test 2
Matlab Basics II - Max & Index of Max
Divide by 4
MATLAB Basic: rounding III
Find the last digit
Calculating selling price
modulus of a number
multiply an array by its position number
find the mean of all elements in a matrix
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