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.
Find best placement for ordered dominoes (harder)
Volume difference between Ellipsoid and Sphere
03 - Matrix Variables 1
Vectors counting by 2
Divide by 4
Pattern Recognition 2 - Known Unit Length, Various Array Length (including cell arrays)
Divisible by 14
Divisible by n, prime divisors (including powers)
Lights Out 8 - 5x5, light-only solution? I
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