test suite 1 is wrong
what are you using for pi?
indeed,why don't you use pi?
Test case 2 is wrong, also description is wrong. Do you want volume, circumference, or area?
Determine whether a vector is monotonically increasing
Volume and area of a sphere
multiply by three
Create a square matrix of zeros of even order
factorial of a number x
Speed of car
Determine if a row vector has NaN
Test if a number is numeric or not
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