@Doddy, This can be solved by a trivial solution something like -
a=0,b=0,c=1,d=1. The test suite will accept the solution, however, this is not something you want (only using non-zero integers as mentioned in the problem statement).
I have edited the test suite accordingly, and will do so wherever I face the same issue in the Number puzzle series.
Remove any row in which a NaN appears
Find the sum of the elements in the "second" diagonal
Get the length of a given vector
Multiply by 3
Convert radians to degrees
Number Puzzle - 075
Number Puzzles - 008
Number Puzzle - 081
Number Puzzle - 069
Area Conversion 1
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