Li Yan, Tang Shishi, and Tang Xiu's brothers and sisters sat at the stone table in the garden, with four teas, two plates of pastries, and a piece of paper on the stone table. Li Yan, Tang Shishi and Tang Xiu, looking at the piece of paper, all had sad faces, sighing, for no other reason, it was what was written on the paper in front of them.

On this one, a nine-square grid is drawn, and in the center of the grid is written a 'five' word, and there is nothing else, how do you say it doesn't make people sad, after all, this kind of nine-palace number is the first time they have come into contact with it, and what's worse is that it's just a number, and the three numbers in each row and column add up to fifteen, which can't help but make people helpless, and it also makes people crazy. But there is no way around it.

Tang Xiu couldn't think of it after looking at it for a long time, so he drooped his face and said, "Just a number, how to do this?" No matter how you say it, you have to give a line of numbers, this is completely embarrassing, and embarrassing people is not this difficult method. ”

When Tang Shishi heard Tang Xiu's words, she also said a little approvingly: "This is a bit too difficult, if it really doesn't work, ask him tomorrow, after all, this is also a helpless thing." ”

"Oh, yes." Tang Xiu seemed to suddenly think of something, and said, "Do you want us to ask my uncle and aunt." ”

"Ask them?" Tang Shishi heard Tang Xiu's words, shook his head and said: "I think it's better to forget it, my mother won't do this, if it's poetry and songs, it's okay, but this, it's not okay, I don't know if my father will be able to, but even if you want to look for him, he doesn't know if he's coming back now, he's been very busy recently." ”

"Ugh. So what to do? Tang Xiu glanced up at the sky and said, "Otherwise, let's forget it, it's all about it now." ”

This is Tang Lan said: "If you give up, let's talk about it after eating, let's think about it here now, and it's good that we can write two." ”

Li Yan also smiled at this time and said: "Hehe, Tang Lan is right, as long as we can write two, it is also a good result, and I probably see a little bit of fame in this." ”

"Huh?" When the three of them heard Li Yan's words, they were also shocked, and looked at Li Yan in disbelief and said, "You see the fame?" ”

Seeing everyone's unbelievable expressions, Li Yan smiled undeniably and didn't say anything, but looked at the maid not far away and said, "Xiao Ai, you go and get a wooden plate and put some sand in it, and you are taking a small wooden branch, or a bamboo branch, and then bring it over."

The maid on the side heard what Li Yan said to take, and her face was puzzled, but as a subordinate, she didn't say anything, so she still responded: "Okay, son." With that, he left.

This Xiao Ai is Tang Shishi's personal maid, although she doesn't travel with her own time most of the time, she still often follows her in the house. Originally, Li Yushi and Tang Shishi still had Tang Liwen, and I gave Li Yan one, but Li Yan said that he was not used to this, so he didn't ask for it.

After a while, Xiao Ai brought a plate of sand with a small bamboo stick on it, placed it on the stone table, and continued to stand aside. Tang Shishi and Tang Xiu, brother and sister, were very curious about what Li Yan wanted these things for, but they didn't ask, because they understood the use of these things in the next matter.

Li Yan picked up the bamboo branch in the wooden plate, drew the same grid and wrote the same number on the paper, and copied it in exactly the same way. Then he looked at Tang Shishi and Tang Xiu's brothers and sisters and said, "Didn't Mr. Xu Bai say that the three numbers in each row and column should add up to fifteen." But he only gave us a number. Li Yan said here, pointed to the word 'five' written on the sand table and continued: "But this is also a breakthrough, we use the most stupid way to use two numbers and add the word 'five' in the middle of the nine palaces, for example, one plus five plus one, so that by analogy, in the end, one group is obtained, and the next group is replaced." Rows and columns, I prefer columns, so let's start with the middle column of the column. ”

Everyone listened very carefully to what Li Yan said, and several people agreed with Li Yan's analysis, and finally nodded when they heard Li Yan's method.

In the borrowed time, Li Yan and the others tried to take two numbers and add five characters one by one, and finally came up with a group of 'one plus five plus nine', and they were a little happy to get this group, but it was only one of them, there were many groups. So I didn't rejoice either.

However, if you have to come up with a group, you will take a step forward after writing the space of the nine-square grid.

When Tang Xiu saw the group that came out, he happily proposed: "Since there is a group, let's write this group of numbers in the space, okay?" ”

Tang Shishi and Tang Lan heard this, nodded and agreed, while Li Yan shook his head and said: "Don't be busy yet, I suddenly thought of a question, if this is written, it can be obtained later, but it can be obtained first, in case the sum is not equal to or greater than, it is not wrong." ”

Everyone originally wanted to write happily, but when they heard Li Yan's analysis, they suddenly lost their mood. When Li Yan saw them like this, he smiled and said, "Hehe, let's write down the three numbers on a piece of paper, and wait for all the numbers to be filled in by the last person." ”

When Tang Shishi heard Li Yan's words, she nodded and said: "The method that Xiao Yanzi said is feasible, so we will do what Xiao Yanzi said." ”

Since they have paid attention, everyone continued to assemble the next set of numbers, and in this way, in a quarter of an hour, Li Yan and the others added everything to five equals fifteen, and added the previous ones, a total of four groups.

Tang Lan glanced at the four sets of numbers written on the paper and said, "After writing the numbers added to five, the next thing we need to do is write the numbers that are equal to fifteen that are not added to five." ”

When Li Yan heard Tang Lan's words, he said from afar: "I don't think there's any need to be so troublesome, let's just fill in the final filling, and the numbers should be written, as long as the typesetting is out, it should be written." ”

When Tang Shishi heard Li Yan's words, she said disapprovingly: "Your method is a bit unworkable, according to your example, it will take a lot of time to typeset it in the end, if you get all the numbers of groups, the typesetting will be very good." ”

"Well..., it seems to be too." When Li Yan heard what Tang Shishi said, he felt that it made sense and said: "But I didn't expect it, okay, since this is the case, it is also good to do it according to this method." ”

But when they were about to continue, Li Yushi's personal maid Xiao An came to everyone and said, "Miss, Li Gongzi, Tang Xiu Gongzi, Miss Tang Lan, Madame has called you to dine." ”

"Dine." Tang Shishi heard Xiao An's words, looked up at the sky, and saw that the sky had darkened, and it was already time for the lights to come on. looked at Xiao An and said, "Okay, you go back and talk to your mother, we'll come right away." ”

When Xiao An heard Tang Shishi's words, he nodded and said, "Okay, Miss, I know." After saying that, he bowed and left.

When Li Yan saw this, he said: "Since it's time for dinner, let's go and eat the meal and continue to make this, we can't let my aunt wait for a long time." ”

"Hmm. Tang Shishi agreed with what Li Yan said, and she was also hungry, so she said: "Then let's go to dinner," Speaking of this, she looked at Xiao Ai and said, "Xiao Ai, you can also go to eat, I'm okay here for the time being." ”

"Well, yes, miss." Xiao Ai heard what Tang Shishi said, nodded and left.

When they saw this, they all went together to the place where they were eating.