Same issue here as in your third problem. Please check the absolute value of the differences of the computed values with the correct ones. Otherwise, more silly answers (again, like this one :-) will slip through!
Thanks for the catch. I've updated the test suite to check against upper and lower bounds of each answer.
Replace May with April
Slicing the cube
length of a vector
Finding perimeter of a rectangle
Divisible by 4
Pattern Recognition 3 - Variable Unit and Array Length (including cell arrays)
Calculator spelling - Letters to Numbers
Stress-Strain Properties - 6
Scrabble Scores - 5
Divisible by 3
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