I have kept this at home. There are some signs of sun damage, but it's in good condition with no writing or markings. I used to solve these endlessly in high school to prepare for the center exam. The math content may have changed slightly since then, but solving these problems will build a solid foundation. How about using these to solidify your basics? - Title: Mathematics II-B One Question, One Answer Complete Edition - Title: Mathematics I-A One Question, One Answer Complete Edition - Price: 952 yen + tax