This is a math problem collection and reference book used by Teiryo-kai, a cram school specializing in entrance exams for top universities, for high school seniors. The difficulty level is such that mastering these problems is sufficient to handle the math section of the University of Tokyo entrance exam, and the answer explanations are very thorough. It was used with a book cover, so there are no scratches on the cover, but it has been used, so there are writings throughout, as shown in the second photo. Please understand this before purchasing. Instant purchase and price negotiation are welcome! #Teiryo-kai #University of Tokyo