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.
Test for balanced parentheses
Connect Four Win Checker
Construct a string from letters and counts
Back to basics 15 - classes
Generate a NaN...on purpose
Are you in or are you out?
Flip the bit
All your base are belong to us
Is my wife right?
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