There are many poems, but literally, we can't see their connection with mathematics, but if we think carefully and rethink the contents of poems with mathematical knowledge, we will have a new understanding.
For example, in the opera Sister Liu, Sister Liu sang against three scholars (Tao, Li and Luo), and Luo Xiucai said, "Little sparrows don't show off their bravado, and 300 dogs share their food. One less and three more are singular, depending on how you distinguish them. " Sister Liu said, "Ninety-nine went hunting and ninety-nine came to see the sheep." Ninety-nine guards were at the gate, leaving three strange minions. "Do the math and you will find that 300 = 99 99 99 3. This is exactly the problem of integer division in mathematics. If there is no splitting sequence, there are four splitting methods: 300 = 99 99 99 3 = 99 99 399 = 99 399 99 = 3 99 99 99 = 3 99 99 99 = 3 99 99 99 = 3 99 99 99. Obviously, if the sequential splitting is taken into account, the number of the above splits is 4; Regardless of order, there are 1 species. At this time, there can be a more general question: "How many different ways are there to divide 300 into the sum of four odd numbers in sequence? "It is not hard to imagine that if Luo Xiucai, who sang with Liu Sanjie in those days, changed the last sentence of the lyrics to:" Please make it clear how many points there are ",then even if Liu Sanjie is very smart, I am afraid it will be difficult to cope for a while.