It seems to me that I am completely unaware of the thermos formulas that are used in the solutions, and answers to the problems that are assigned on Brilliant. There is a lot of stuff on here that takes me hours to even days to understand. Because of this I'm subject to drop in math levels(like I already have). In my entire school Career (pk-11) I have never been taught by anyone how to do the likes of these problems, and or learned theorems and formulas that can be used with Brilliant problems.
So, I come to ask.. Is there any place that anyone would recommend that I go to, to study up on certain math topics to learn? I want to be able to do math fast and simple.
This is not just for brilliant,but for personal satisfaction on knowing topics of math that could potentially be used in the future.
And to compete with my friends in my school who also do brilliant. Haha.