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.
Make a 1 hot vector
Matrix to column conversion
Find a Pythagorean triple
Right and wrong
Is my wife right? Now with even more wrong husband
Is my wife right?
Sum my indices
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