Purchased for my child. We repeated it many times because it really sharpens thinking skills. Therefore, there is some wear and tear. I am selling it because my child has outgrown it. The answers were not included when I purchased it used, but I didn't have any trouble because an adult can figure out most of the answers. The book is slightly bent. There are writings up to 14 out of 50 items, which have been erased with an eraser. Only one sticker has been used. It's a very good educational material, so I'm selling it to someone who will use it (*^^*) "Z-Kai Thinking Skills Expanding Workbook for Elementary School Students: Introductory Edition" Z-Kai Editorial Department Price: ¥1000 Thank you for your understanding.