Turning around and looking at the picture in front of me again, the paper material could not be less, or using the same piece of paper, forty-nine small grids to cut, and out of thin air became forty-eight.

One less square from under the nose? Can this kind of thing be done?

If it could really go from 49 to 48, where did the disappeared one go?

After Da Niu finished speaking, Li Chunfeng noticed the child's expectant gaze, and the children in the classroom all gathered around.

The children had already begun to discuss, Li Chunfeng looked at this drawing, and kept thinking about the method in his mind, sweating like rain.

Da Niu asked in a low voice, "Teacher Li Chunfeng, have you made it?" ”

"Give Poor Dao some more time." Li Chunfeng hurriedly said.

This kind of topic is somewhat similar to Zhao Shuang's sketch in the Later Han Dynasty.

There seems to be a similar title in the Sutra of the Calculations of the Zhou Dynasty.

Li Chunfeng thinks that he has studied it, and Li Zheng's question must have been deduced from Zhao Shuang's sketch, and it is more difficult.

Disappear into thin air?

Is this kind of thing possible?

It's like a hundred copper coins, and you can turn them into ninety-nine?

Disappearing into thin air?

Sounds a bit fanciful.

"Teacher? Figured it out? Da Niu asked again.

Li Zheng was coming up with some strange topics all day long, and Li Chunfeng wiped the sweat from his forehead again.

Pick up this picture, get up and leave the class.

"Huh? Why did the teacher just leave? ”

A child watched Li Chunfeng leave and asked curiously.

"The teacher may be in urgent need of urine, let's study on our own." The big bull commanded the children to sit down.

Li Zheng was sitting by the river and fishing, the Jingyang River in spring was very warm, and the environment of birds and flowers made people unconsciously relax.

Li Chunfeng's eyes were red and bloodshot, he gritted his teeth with a hideous expression, and strode over.

Looking at his expression, Li Zheng gasped, "Daochang Li, what's wrong with you?" Why do you have a murderous face? ”

Li Chunfeng put the figure in front of Li Zheng's eyes, glared at his eyes and said, "Li Zheng, you tell me, how to do it by disappearing out of thin air." ”

"Uh...... This ......"

Li Chunfeng said: "Don't tell Poor Dao that you don't know. ”

"I do." Li Zheng nodded.

"Good!" Li Chunfeng put the figure in Li Zheng's hand, "Poor Dao looks at how you make it disappear out of thin air." ”

The interest of fishing was interrupted, Li Zheng used a fishing hook to cut, and said while cutting: "In fact, this is a slope problem of oblique cutting, and it is also an illusion of area, which is somewhat similar to the trick of blinding." ”

Li Chunfeng looked at Li Zheng's skillful movements, and was a little dazzled.

Several cuts, the rear square is cut into several pieces.

Li Zheng said to Li Chunfeng: "Next, Daochang Li should be optimistic." ”

Seeing that Li Zheng was about to splic, Li Chunfeng was also watched with bated breath.

After scrambling the cut pieces, reassemble them.

It was quiet, so quiet that you could only hear your own breathing.

When the last piece of fragment was put together, Li Chunfeng jumped up on the spot in shock, his fingers trembling and pointing at this figure, and there was really a piece missing in the middle.

"You...... How did you do it! Li Chunfeng breathed heavily and stared at the square with one less piece in the middle.

Feeling that something was wrong again, Li Chunfeng counted it over and over again, and said to himself like a madman, "It's really changed from forty-nine to forty-eight." ”

Looking at Li Chunfeng's expression, Li Zheng asked nervously, "Daochang Li, are you okay?" ”

Li Chunfeng counted over and over again, "How is it possible!" ”

Looking at Li Zheng again, Li Chunfeng looked at Li Zheng with bloodshot eyes, "Is there another piece that you have hidden, and where did the middle piece go?" ”

Li Zheng re-hung the bait and threw the hook into the river, "Every move just now is under the nose of Daochang Li." ”

Li Chunfeng nodded slightly, and Li Zheng's every move just now was under his nose.

If Li Zheng really did something, it was impossible for him not to see it.

Besides, Li Zheng doesn't need to fool himself so much.

Staring at the missing piece in the middle of the figure, Li Chunfeng also poked it with his hand to confirm that it was not his hallucination.

"Li Zheng, you tell Poor Dao, what the hell is going on."

With one hand on his chin, Li is looking at the river, which is actually an Olympiad problem that is used as a puzzle game for children.

Li Zheng explained in a low voice: "In fact, the size of the large square has changed, but it is divided into other lines through my cutting, and it is not easy to distinguish, the mystery of this is in my oblique cutting, Li Daochang might as well try it himself, whether the size before and after cutting has changed." ”

Li Chunfeng put away the fragments that Li Zheng had cut on the ground, and carefully put them into his arms.

"Li Zheng, if it is really as you said, I, Li Chunfeng, will follow you with all my heart in the future."

"Daochang Li's words are serious." Li Zheng hurriedly said.

Li Chunfeng took these pieces that Li Zheng had cut out and left.

After he left, Li Zheng asked the children in the village to find out what was happening in class.

It's not that Li Chunfeng is embarrassed, maybe he has laid the children's foundation in mathematics a little high?

Li Zheng let out a long sigh of wistfulness, hoping that Li Chunfeng would not go mad again.

When Li Chunfeng returned to Qin Tianjian, he analyzed Li Zheng's topic.

According to Li Zheng's cutting fragments, he also drew a gourd according to the scoop and cut it again.

According to Li Zheng's order, it was re-assembled, and when the last piece of fragment was put together, sure enough, the most central position was missing a square.

Li Chunfeng used the same method and tried more than ten pieces of paper.

As Li Zheng said, in fact, there is no shortage of paper materials, one piece of lattice is missing, and the square has become larger.

The vanished grid blends into the total size.

Actually, that grid has not disappeared.

Several cutting lines are full of mysteries.

Some people look at the line just the line, and some people look at the picture just the figure.

But the mystery and use are far from being as simple as they seem.

Knowing the truth, Li Chunfeng laughed, as if he had found the truth of his life's pursuit.

"This is the realm that Poor Dao has been pursuing all his life." Li Chunfeng looked at this picture with fiery eyes.

Mathematics can go a long way up, and after Li Chunfeng wrote down this question, he hung it in the Hongwen Pavilion.

Waiting for the students in Chang'an to answer too.

Looking at the many scholars in the Hongwen Pavilion, they are still debating the way of life.

Li Chunfeng shook his head and smiled, suddenly feeling that these people didn't know the height of the sky, and they never knew where the end would be if they hadn't seen the high realm.

In Li Chunfeng's eyes, these students are mortals.

What I have mastered may be the feeling that ordinary people in the Central Plains have never experienced.

Walking out of the Hongwen Pavilion, Li Chunfeng came to Li Shimin and handed over his resignation.

Li Shimin looked at Li Chunfeng with his chin bowed, "Daoist Li, why did you leave at this time, is there anything inconsiderate about Qin Tianjian?" ”