2. This year's college entrance examination in Hubei Province, because students can't read classical Chinese, they shouted that they were injured, and netizens triggered a spit boom. Because the sound of the word "turtle" in the title seems to be very noisy, some netizens simply beg "teacher, stop it." But some people can get a glimpse of the magic of ancient mathematics in China-
This college entrance examination question is taken from "Nine Chapters of Arithmetic and Business": "If you solve the cube obliquely, you will get two pieces, one is Ma Yang and the other is tortoise. It is not easy for a horse to come second and a turtle to come first. Combine two turtles and three into one, and test it with chess, and its shape is revealed. "
It involves two ancient names, the turtle and the forelimb of the turtle, which is what the ancients called the triangular pyramid. Two soft-shelled turtles together are called "Yang Ma". "Yang Ma ranked second and turtle ranked first, which was hard to come by." It's called the Liu Hui principle.
The difficulty coefficient of this question is not big, but many candidates are stuck in turtles and horses. It seems that we should learn ancient Chinese well before learning mathematics.