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.
Back to basics 14 - Keywords
Angle between Two Vectors
Calculate the Number of Sign Changes in a Row Vector (No Element Is Zero)
Side of an equilateral triangle
Flip the bit
Divisible by 3
Legend of Zelda - Rupee Count (Compact)
Combined Ages 3 - Non-symmetric, n ≥ 3
Consecutive Equation Times (of the day)
Stress-Strain Properties - 4
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