true

Duplicate.

Sorry about that, I've swapped them so they are now correct. I don't make Codewars Kata very often so I tend to forget the nitty gritties of creating one.

Thanks so much!

Actual and expected are swapped

Thanks. I added 50 random tests and I fixed the typo in the description.

• No random tests

• you're should be your in description

I got the exact same problem. It doesn't make sense.

Added the input ranges for the different tests in the description. Thanks.

Added performace tests for bigger numbers. Thanks for the feedback. Now, in all my subsequent katas, I will remember to check for performance. Again, thanks a lot.

I do not understand your last statement 'There is a big difference whether or not number is representable as a float'

Input range should be specified in description. There is a big difference whether or not number is representable as a float.

This should not pass:
https://www.codewars.com/kata/reviews/60e1547c25f2b300019663e1/groups/60e171d9e8a69e00018b43c9

>>> root(5000**3 - 1, 3)
5000

My bad - Added some test cases for None returns. Thanks.

If there is no whole number x that satisfies the equation x^exp=number, return None.

You don't seem to ever actually test this. You should either test it or change it that the numbers will always satisfy the equation.