Yang Ruoqing turned out from behind the willow tree, suppressing the excitement and nervousness in her heart, and looked at Chen'er in front of her, her eyes filled with joy.

"I hid it so deeply, but you still discovered it, haha, you have such good eyesight, you brat."

Yang Ruoqing greeted Chen'er with a smile.

Chen'er was obviously a little surprised when he saw that the person who followed him all the way turned out to be the woman who had stood up for him at the cultural banquet.

But then he returned to his normal state, and his indifferent eyes fell on Yang Ruoqing's face: "For the sake of speaking out for me at the previous cultural banquet, I will give you a chance to tell you your purpose."

Yang Ruoqing couldn't help but roll her eyes at Chen'er and said, "How old are you, kid? Can't you speak so old-fashioned and have an iceberg face?"

Chen'er frowned slightly.

"Tell me, why are you following me?" He said calmly, still looking like he was rejecting people thousands of miles away.

Yang Ruoqing smiled, took a few steps forward, and circled around him, thinking that the child was indeed tall.

A seven-year-old child is almost as tall as a nine-year-old.

"The graph problem that you and Yan were discussing earlier was not the only one with the solution you wrote." She said.

Purpose?

Of course she does, but before she can tell her purpose, she has to throw out the bait.

For other children of this age, maybe a handful of snacks, two snacks, or some toys will do the trick.

But Chen'er obviously can't do it. This child is mentally mature!

So you have to throw out something that interests him.

Sure enough, after hearing Yang Ruoqing's words, Chen'er's eyes showed a bit of surprise.

"How is it possible? That question is the most difficult question among the nine chapters of arithmetic," he said.

"Since the book was written so far, no one has been able to solve this problem. It can be said that I am the first person to figure out the mystery. Otherwise, at the banquet today, Teacher Yan and everyone in the audience would not be able to solve the problem.

It would be so shocking.”

Speaking of this, Chen'er's chest puffed up, and her eyes and brows were filled with pride.

This brat is quite conceited.

Yang Ruoqing thought to herself, but today, she has to let him know whether it is ginger or old and spicy.

"If I say that I also have a way to solve the problem, and there is more than one way, there are three ways, would you like to listen?"

Yang Ruoqing said, raising her finger to make a three sign.

Chen'er said nothing and looked at Yang Ruoqing with questioning eyes.

Yang Ruoqing raised her lips and smiled, without saying anything else, she just broke off a willow branch on the side of the road, squatted on the ground, and redrawn the picture on the stone slab.

Seeing that Yang Ruoqing could draw the previous question on the ground, Chen'er became even more suspicious.

I didn't quite believe that a woman would understand this, but her feet involuntarily came behind Yang Ruoqing, and her gaze went over her head, following her hands and the willow branches in her hands.

After watching Yang Ruoqing draw a figure on the ground, she then added an auxiliary line to the figure with two strokes.

The question that was originally a dead end suddenly became alive.

Chen'er can immediately use this auxiliary line to spy out endless mysteries.

"this……"

He was so surprised that he couldn't speak. Is this okay? Why didn't I think of it?

Yang Ruoqing turned around and looked at Chen'er with a smile.

"How's it going? This is the first solution. Is it simpler and faster than the solution you had on stage today?" she asked.

Chen'er nodded, his eyes always falling on the graphics on the ground, seeming to be immersed in it.

Yang Ruoqing said: "I have two other solutions. Do you want to see them?"

Chen'er said without hesitation: "Yes, of course!"

The indifferent ice cubes in his eyes all melted away at this time, replaced by a burning light, which was a sign of thirst for talents.

This child has a really strong desire for knowledge.

"I can tell you two other ways to solve the problem, and they are more subtle. However, you have to agree to my request." Yang Ruoqing said.

There was a hint of vigilance in Chen'er's eyes, "Tell me about it."

Yang Ruoqing raised her eyebrows, looked at him, and smiled without saying a word.

For some reason, Chen'er suddenly felt a chill all over his body. He was fearless and shivered.

"Don't be nervous, I won't eat you..."

Yang Ruoqing couldn't help but raise her hand and pinch Chen'er's cheek gently. Chen'er didn't pay attention and was pinched by Yang Ruoqing.

"Wow, this feels so good, little fresh meat!" Yang Ruoqing was like an old witch, and she swallowed her saliva shamelessly when she said this.

Chen'er's face turned red, she slapped Yang Ruoqing's hand away and took a step back.

"Say your conditions!" Chen'er said again.

Yang Ruoqing still smiled mysteriously and said: "No hurry, no hurry, wait until I tell you the remaining two problem-solving methods, and I won't be too late to mention them again. I guess you are not the kind of person who doesn't keep his promises, right?

"

Chen'er nodded arrogantly, of course!

Yang Ruoqing picked up the willow branch, squatted down again, and demonstrated the remaining two problem-solving methods in detail.

While demonstrating, I also gave a brief oral introduction.

Please forgive me, she has never studied the Nine Chapters arithmetic or anything like that.

But she came from modern times, and she studied geometry and solid geometry.

For a period of time, she even worked as an engineer for a period of time in order to carry out tasks.

This difficult problem for Teacher Yan, Chen'er, and even the entire Daqi literati, in her eyes, is just a modern solid geometry problem.

Just add a few auxiliary lines and apply the formula to solve it easily.

After the two methods were demonstrated, Yang Ruoqing was secretly happy when she saw Chen'er's stunned look. This time the pretense was successful, yeah!

Yang Ruoqing remained silent, leaving Chen'er enough time to taste and digest these three solutions.

It can be seen that this child is extremely talented in this area, because mathematics itself has a unique kind of fun. Only those who are addicted to it and can control it can experience the fun brought by the evolution of numbers and lines.

After Chen'er completely absorbed and digested all this, he raised his head.

She found that Yang Ruoqing had been standing aside patiently, waiting, while he was looking at the questions on the ground, while she was just looking at her with a smile.

This look... gave him an indescribable feeling, as if he was a piece of fat being stared at by her.

"I am a trustworthy person. Tell me what you want me to do for you. As long as it is within my ability, I will never refuse." Chen'er took the initiative to speak.

Yang Ruoqing's eyes lit up, she came up to him and said excitedly: "Really? Then take off your pants and let me take a look at your butt!"

What?

Chen'er thought she had heard wrongly, and was so shocked that her jaw almost dropped to the ground, and her face turned red all the way to her neck.

He immediately jumped back and subconsciously grabbed his clothes with one hand, looking at Yang Ruoqing in shock.
Chapter completed!