A set of math problem collection and answer key. - Title: Systematic Problem Collection Mathematics 1 - Author: Development - Type: Answer Key - Publisher: Kenkyusha Publishing - Volume: 1 Except for some light writing in the drawing section (about 6 pages), it is in good condition with no other writing or folds. Also, there is a tear on the cover of the answer key, but other than that, I think there are no noticeable scratches or writing. (I apologize if I missed anything.) The name was written on it, so it will be cut out before shipping. For those who understand that this is a used item, please consider it. Thank you for viewing.