willfowls, use the units stated in the kata description.

last test case. 6 is not greater than 9.1

It is a 7kyu

which one as from my point of view they are absolutely fine?

i think one sample test case is wrong

i have an issue in returning none in problem

to solve this kata you just have to observe pattern in tests

You may need to learn more about number systems (bases or radix) and/or maths in general. The underlying concept is not elementary mathematics, even though the coding part is very basic.

You may start here: https://www.mathsisfun.com/numbers/bases.html
or here: https://en.wikipedia.org/wiki/Radix

You may need to learn more about number systems (bases or radix) and/or maths in general. The underlying concept is not elementary mathematics, even though the coding part is very basic.

you may start here: https://www.mathsisfun.com/numbers/bases.html

I hae no idea what all of this means. ^ is power? like 2.19**1?

Not base 16. In description is base 19.
And 39 = 2.19^1 + 1.19^0.
So answer is 21

@anter69, that didn't help at all. Can you tell me how they get 21 from 39 using this "base 16" (according to wikipedia base 16 is 42, numbers from 0-9 + letters in alphabet). 42-39 is 3, multiplying will only make it go higher so really, hot to get 21 with 39 and 42?

Fixed

C# actual and expected are reversed.