1 and 20 16, and there are 15 people with full marks in mathematics.

2.20 17 There are 32 people.

In 3.20 18 years, it reached 53 people. The rise of this figure is related to the reform of the senior high school entrance examination in Beijing. The new examination system puts forward higher requirements for students' mathematical ability, so more students strive to improve their mathematical level and achieve better results. In addition, the society's concern for students with high scores has also inspired more people to strive for full marks in mathematics.