Check whether the input matrix is a figurate number triangle: http://mathworld.wolfram.com/FigurateNumberTriangle.html
you should probably add a test case where the correct answer is false.
I added a few more tests as suggested.
Remove the two elements next to NaN value
Multiply 2 numbers
Sum the Digits of a Number
Equal to their cube
Switch matrix to a column vector
The Hitchhiker's Guide to MATLAB
Right and wrong
Sum my indices
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