I purchased this but only used it a little because I joined a cram school. (Chapter 1: Positive and Negative Numbers, Addition/Subtraction, Multiplication/Division I only did the first 6 pages.) The answer key is also included. There is no particular damage outside of the used sections, and I believe it can still be utilized, but please refrain from purchasing if you are seeking perfection. This is a study guide designed to strengthen junior high school 1st-year mathematics using the 3-Step method. - Title: High Class Test Mathematics Junior High 1st Year - Language: Japanese - Format: Study Guide - Features: Develop top-level academic ability with the 3-Step method - Publisher: Juken Kenkyusha - Target Grade: Junior High 1st Year - Content: Problem book for regular test preparation and academic improvement Thank you for looking.