This is a textbook used in the second semester of 2022 by high school seniors at Teru-ryokukai. It is a set designed for the University of Tokyo entrance exam, including a set for developing thinking skills and a practice set, all formatted as actual exam questions. Important questions are marked with a ⭐, allowing you to focus on the most crucial problems. This is a recommended resource for those who want to increase their practice. As shown in the second photo, there are some initial markings from when the problems were solved, but they are in pencil and can be erased. Also, the name on the back cover has been scraped off. Please be aware of this. There are some pencil marks and other minor signs of use, but there are no major stains or folds.