Ask HN: Are there any codewars like math resources

Maybe some background could help someone steer me in the right direction.

I used to like math. Things happened (war in my country namely) and I went through school with huge gaps in math knowledge. I’m 43, with 20y programming experience (self thought for the most part).

I tried Khan Academy but I’m having trouble knowing where to start, which path to take.

I’m imagining a resource similar to codewars [1] where problems are given, maybe hints for solving them (like tags with math topics) and grouped by difficulty and pre-required knowledge. I’d find a problem, do research (khan, google...) come up with solution that would be automatically tested. I could see other people’s solutions and discussion about them.

[1] https://www.codewars.com/