Problem sets for thoroughly learning the fundamentals of mathematics, with answer and explanation sections. - Title: Mark-Style Basic Problem Set Mathematics I・A - Title: Mark-Style Basic Problem Set Mathematics II・B・C - Explanation Section: Answer and Explanation Section - Publisher: Kawai Publishing - Edition: 7th Edition Thank you for viewing. Since it was used, there are some wrinkles, folds, and wear, but I think it will not interfere with use. Please check the condition from the images.