Aochart, published by Suken Shuppan, New Curriculum Mathematics IA, Mathematics IIB, Mathematics IIIC Set of 3 books. Mathematics IA The problem book has minor scratches on the cover, but the inside is clean. The answer key has been well-used and is not in good condition. Mathematics IIB The problem book has a fold on the cover, but the inside is clean. The answer key has discoloration from erasing a written name on the back. Mathematics IIIC Unused, so it is in a clean condition. I don't think there are any writings, but I haven't checked every page. Please understand that there may be oversight. Please consider after checking the photos.