One of the famous ancient mathematics interesting questions in China. What are the famous ancient mathematics interesting questions in China?

1. Chickens and rabbits in the same cage is one of the famous mathematical problems in ancient China. About 15 years ago, this interesting question was recorded in Sun Tzu's Calculations. It is described in the book as follows: There are pheasant rabbits in the same cage today, with 35 heads on the top and 94 feet on the bottom. What are the geometries of pheasant rabbits? These four sentences mean that there are several chickens and rabbits in a cage, counting from the top, there are 35 heads, and counting from the bottom, there are 94 feet. How many chickens and rabbits are there in each cage?

2. The essence of this problem is a binary equation. If the teaching method is proper, pupils can understand the concepts of unknowns and equations, and exercise their ability to abstract numbers from applied problems. Generally, in the fourth to sixth grade of primary school, it is taught with the content of one-dimensional linear equation.