Confused on understanding GMAT Quant and formulas

Hi mactuan12
I would like to share with you my experience regarding the quant. I got Q51 with no course, but with the help of the content of this club.

here is my recipe:
1- study each topic from this megathread: https://gmatclub.com/forum/ultimate-gmat-quantitative-megathread-244512.html#p1886497
2- After each topic, don't jump to the next until you practice questions on it.
3- After finishing a topic, go to the questionbank https://gmatclub.com/forum/search.php?view=search_tags
4- choose the same topic, start with the easy difficulty, and choose known sources only (Offical guide, Kaplan, Veritas, Manhattan,....) and click search
5- rearrange the questions in decending order according to the number of kudos.
6- Solve the top questions (easy top 50) (medium top 25) (hard top 15)
7- for each question, use the time counter.
8- for any question that you solved too slow or solved wrong, add it to you bookmark.
9- read the explanation of each questions thoroughly (both right and wrong ones)
10- pay attention to how the questions are answered and the concept behind
11- if you find any new concept or formula, write it down in a separate paper for your reference.
12- repeat these steps for each topic by advancing from easy to medium to hard.
13- don't skip a level without making sure that the previous level is mastered (easy 90%, medium 80%, hard 65%)
14- don't skip a day without solving quant.