The fifth-grade major league gold medal can be won within 20 mistakes. As a math contest in the United States, the Major League of America can win the prize if it keeps above 150 in the 20 wrong questions published by official website. The "Major League Mathematics Cup" in the United States is the most influential mathematics competition for primary and secondary schools in the United States and even North America, and it is also a mathematics competition for primary and secondary schools with global influence.