32 to 35 years old. The 35 questions in the major leagues are the first prizes of 32 to 35 questions. If the range of wrong questions is 1%~3%, you can win the gold medal. The thinking activity of the American Mathematical Union is to give questions to candidates together with many world-renowned universities such as Princeton and Columbia University, which shows the high gold content. MathLeague has a high influence and recognition in North America. If you can rank, you can improve the chances of applying for admission to North American high schools and universities in the future.