I actually pushed back my exam almost 2 months just for math alone. To say I was lacking a foundation in math is an understatement. Going through the math destroyer exams took me a lot of time, and then I had to review the material and google the questions I had no idea about, which was practically every one. Then I gave qvualt a try and that went a bit faster. Math is about repetition but at the same time, you need to keep all the sciences fresh in your head. Thats the most difficult part imo, juggling everything when you have a real weakness in one area. Its incredibly frustrating.
I got a 19 in qr and I was getting mid to low teens (correct answers) on the math destroyer, while using chads notes in front of me to answer the question. Yeah, I was in bad shape 😛. I would start with QR first if I could do things over again. QR,BIO and PAT need some time to settle in your brain. You can steam roll through GC/OC and do well.