There are 26 complete mathematics textbooks for senior high school, including 5 compulsory textbooks, 2 elective books in 1 series, 3 elective books in 2 series, 6 elective books in 3 series and 4 elective books in 10 series.
However, as a high school syllabus, there are 9 liberal arts books and 0/0 science books.
1 * * * 5 is required reading, 2 books for liberal arts 1 series, 3 books for science series 2, and the last 4-4 and 4-5 will produce a multiple-choice question at the finale.