How to memories 30 pages per day with 6 hours of school?

Hey everyone, I am a class 10 student from India. It's already August, I have 26 math chapters and 555 pages of information to learn and memories, how can I do it? And someone don't tell me to do 80/20 rule because I don't which 20 percent is important. Also, I am a West Bengal state board student. Please help me out.