A problem book to learn the secret techniques of entrance exam arithmetic and improve problem-solving skills. It's great that there are many problems! There are no markings inside, but there are folds and damage on the cover. - Title: Entrance Exam Arithmetic Secret Techniques W Check Problem Book - Author: Tadashi Yamauchi - Publisher: Buneido - Contents: Explanations of how to solve the problems - ISBN: 978-4-578-21651-5 - Price: 1105 yen (excluding tax) Thank you for looking.