I didn't know how to do it - I'm not good in such katas. I think there is too much tags - numbers, algorithms, mathematics - it's not the topic of this kata.

Great math riddle - love such ones! Some 1e6 test cases would make it more tricky :)

Correcting simple typos won't teach coding - it would only teach how to correct typos. When you put : instead of = in variable assigment, better make some clear code showing what will those operators do and how they differ. Those aren't common mistakes. I can't imagine someone trying to assign variable with : insted of = nor someone returning cleraly named function argument just next line after assigning another clearly named var.

Correct use of basic math doesn't make my mind highly scientific. Less tag-asceticism could be helpful in preventing ugly guys like me of commenting such katas, alone 'fundamentals' could be expanded with something like 'not-scientific' or 'unreal-world-like-all-katas-pretend-to-be'.

Third test in js has a typo - again test goodSudoku2 instead of goodSudoku3.