are test #3 and #4 correct?
Sorry Rifat, I've messed up test cases. Rescored now.
Arrays are not a natural number..for the tests I mean
@Lorenzo, the input to solution function is always a single number. I've used arrayfun to make multiple tests in a single test case.
I think Test 3 and 4 are (still) faulty. The functions "any" and "all" must be swapped.
Remove the polynomials that have positive real elements of their roots.
Back to basics 25 - Valid variable names
Set the array elements whose value is 13 to 0
Celsius to Kelvin
Find a Pythagorean triple
Another colon problem
Alternative Scoring. Create an incremental spiral.
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