Two math textbooks for Waseda Academy's Sunday Special Training. The units covered are "Speed and Ratio" and "Combinations and Probability." I believe many children find these two units challenging. There are no writings or names on the books. The answers are at the end of the book. As a bonus, I'm including an unused A4-size notebook (60 pages) that I received from Waseda Academy. It's a 5mm grid notebook, so please use it when solving math problems. If you have any questions, please ask in the comments section. #JuniorHighSchoolEntranceExam #EntranceExamForJuniorHighSchool #6thGradeElementarySchool #Waseaca