Chad is definitely not enough and I really struggled with math to the point where I put back my exam several times. I took it a few times and got a 19!
Use chad get your feet wet, use math destroyer as a study guide(multiple times if you have to) and use quvualt as a score analysis. My exam was a mixture between quvualt and math destroyer but more towards quvualt. I would still run through math destroyer first if I was you.
I'll be putting up my breakdown in a few days to give a bit more depth on the math but thats it for the most part.