I wouldn't judge "these math katas" so harshly. I understand you're struggling, but through these struggles you grow. Math katas are fundamentally very important since they teach you one of the most important concepts in programming: analyze your problem thoroughly before trying to solve it.

By the way, if you take a basic Algorithms and Data Structures course, a variation of this kata will probably be one of the first problems you will study.

Hey @gleb4dead and welcome to Codewars;

Just to say that if you are new to the site and currently using the "Next Challenge" feature to navigate the site, it will offer you a mix of different katas; however if there are specific kinds of katas you want to practice or avoid (the mathematics ones in this case), you can use the Search page:

https://www.codewars.com/kata/latest/my-languages?beta=false

where you can choose to train on the kind of topics you are interested in.

You can use the Tags menu - here you have the mathematics tag which tells you it's mathematics themed - to practice recursion or algorithms, or whatever topic you want, using the appropriate tag.