[Machine Translation] This is a quiz book for adults that will help you sharpen your ability to think, think, and reason, which are necessary for daily life and work, and will train your brain all at once while having fun. The book is full of questions that test your instant inspiration and wisdom rather than your knowledge, and quizzes that will raise your intellectual capacity just by challenging yourself. All questions in the book are challenged by volunteers who are current Todai students, and the percentage of correct answers is posted on the website. You can enjoy the competition with Todai students one question at a time.