How much do you know about the mathematics in ancient poems?

The "十" character order, which is the most common type in ancient poetry, is to embed the numbers "one" to "ten" into ancient poetry. For example, poet Shao Yong (shào yōng)'s "Mountain Village Odyssey" has been selected into primary school textbooks:

One goes two or three miles away, and there are four or five houses in Yancun.

There are six or seven pavilions with eighty or ninety flowers.

The poet uniquely and intelligently integrates the monotonous and plain numbers from 1 to 10 into the poem. It seems to be understatement and unremarkable, but in fact it is rich and colorful, and there is something strange in the ordinary. With just a few strokes, a fresh and unique pastoral landscape is sketched out.

2. Miscellaneous number poetry means that there are no definite numbers and rules in the use of numbers in poetry, and they are only written according to the needs of poetry. Most ancient number poems fall into this category. For example, the Tang Dynasty poet Du Fu's "Quatrains":

Two orioles sing in the green willows, and a row of egrets ascends to the blue sky.

The window contains Qianqiu snow of Xiling, and the door is docked with a ship thousands of miles away from Dongwu.

The numbers in the poem include "two", "one", "thousand" and "ten thousand", which form a vibrant and beautiful picture.

3. Poems with the word "一", this type of poetry uses only the word "一".

For example, He Peiyu, a female poet in the Qing Dynasty, was good at writing numerical poems. She wrote "Dusk":

A flower, a willow, a fish rock, a touch of the setting sun and a bird flying.

A mountain, a temple, a water, a forest of yellow leaves, a monk returning home.

Note: Yuji (jī) is a rock by the water that can be used for fishing.

For example, Yang Yuhuan in "One Word of Poetry Ode to the Four Beauties", author: Anonymous:

One is happy and one is sad, one is opposite, one is a bunch of lychees and the other is a bunch of tears.

A poem is recited in a dream, and one day one wakes up and the next one is drunk.

The two one-word poems both use ten "one" characters in succession, but they do not give people the feeling of repetition and monotony.

-------JINGRUI HAINING