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.
True!
I added a few more tests as suggested.
2804 Solvers
Vectorize the digits of an Integer
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How many trades represent all the profit?
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Are all the three given point in the same line?
160 Solvers
Determine if input is a perfect number
106 Solvers