From Quora "How long does it take to master the SAT math section? Is three months enough (like basics practicing and solving) to get 800 from the first trial? I’m in grade 10 and there are many new topics."

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Yes, if you can spend at least an average of an hour per day on the test. That would be roughly 90 hours of practice. That’s enough to learn what you need to know about the math tested by the SAT. I suggest you obtain a review book such as Barron’s SAT, or similar books by Kaplan, Princeton Review, of Gruber. Books that are a few years old are still fine, as long as they’re not older than 2016 editions (2016 was the debut of the “New SAT.”). Even older editions are still pretty good, but they don’t cover right-angle trigonometry or imaginary and complex numbers. You can often get these from your older classmates who’ve taken the test, public libraries, Amazon, half dot com, Craigslist, Rooster, Nextdoor, etc. Searching online might help.
It’s a great idea to use the Khan Academy (it’s good and it’s FREE!) as well as the official practice SAT exams (you can download the math separately from the English). Here’s the link to College Board and Khan Academy and the link to free SATs you can download.

Downloadable Full-Length SAT Practice Tests

https://satsuite.collegeboard.org/sat/practice-preparation/practice-testsI also recommend the Barron’s SAT book, and Barron’s SAT Math Workbook. They’re not expensive new, and if you may be able to get used ones from older friends, Craigslist, etc. for free, or use copies at public libraries, etc. If you practice basically every day for about an hour per day, you should be fine - the books will teach you the substantive math, as well as the “tricks” can use to solve problems faster and the “tricks” that let you see through “tricks” the SAT uses to fool students into choosing wrong answers. You can also try my free YouTube videos:
John Linneball Tutoring

http://www.youtube.com/johnlinneballtutoringHope this helps! - John Linneball