All practice problems are written on the board. I am also selling other Toshin texts, so I can offer a discount for combined purchases. Feel free to comment. Instant purchase is OK. For those aiming for Todai, Osaka University, Tohoku University, medical schools, Nagoya University, Kyushu University, Hokkaido University, etc. Also for those using Sundai, Kawaijuku, summer courses, and winter courses.