Haskell random tests include values of n that are $\le 2$. I made a fork that fixes it.

hello, sorry but the purpose of a suggestion is to propose improvements to the kata, for example new language versions, better tests coverage, better specifications, etc. you cannot use them to give hints to other users, it spoils the kata for them

Perhaps this should be considered 8KYU, not 7..

in sql, the description does not specify wether the output table should have 2 columns or only the res column. That being said, I do believe that outputting 2 columns, the number of angles and the total sum of angles is much better coding practice than just outputting one column just

Obvi you don't have to look it up. Deriving the solution yourself is the fun part.

You only need the total sum, not the input itself

I also think this is 8kyu

You should only return one column, column res.

Ranks can't be changed :(

this 8 kyu not 7 kyu

The only thing that makes it a "challenge" is knowing the formula. A brand new coder can solve this barely knowing a language if they heard the formula once.

Codewars more like Mathwars

I agree.

Way too easy for 7kyu imo