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Seeing that no one answered him, Fang Shisong then spoke: "In that case, I have chosen someone." ”

"Teacher!" As soon as he finished speaking, a boy's voice rang out.

"Li Jun! Have you figured it out? ”

"Yes! Teacher! It took me one night to solve this problem. Li Jun's confident appearance made everyone present can't help but look sideways.

"Since this is the case, then please ask Li Jun to come to the stage to solve this problem for everyone to see."

"Okay! Teacher! ”

Looking at Li Jun who walked over, Leng Kite admired a little, "It's amazing, I've been solving it for two days, and I still can't solve it." ”

"Thinking backwards." A mellow, magnetic voice spoke.

"What?" Leng Kite looked at the young man next to him with some surprise.

I saw the young man's lazy hand supporting his white chin, and his fair and handsome face was filled with a leisurely smile.

"This problem can be solved by thinking about it backwards, but under normal circumstances, people are still more blindly trusting their own thinking, so this problem will make these people feel difficult to solve." The boy said unhurriedly in a low voice.

At this time, the student named Li Jun had already started to solve the problem on the blackboard.

Fang Shisong on the side looked at the solution written by Li Jun and nodded with satisfaction.

"That's amazing!"

"Li Jun is awesome!"

"I've been solving this problem, but I can't solve it, and I've also thought about reverse thinking to solve it, but it feels unlikely, wouldn't that be more troublesome?"

"Teacher! I'm done. ”

"Go down and get back to your seat."

Li Jun confidently put down the chalk and sat back in his original position.

"That's right! How I didn't think of it. Leng Kite took a closer look at the problem-solving process, and suddenly exclaimed with a look of sudden realization.

In fact, not only her, but also the students present quickly understood the whole process after watching the problem-solving process.

"I'll just say, it must be that I'm doing something wrong, so that's how it is."

"Me too, I felt confident when I first started to solve it, but who knew that the more I solved it, the more I felt wrong."

"Hahaha! Li Jun is amazing! ”

"Brother, I figured it out in one night, and I really have you."

Li Jun couldn't help but look proud, "That's not it, I told you that I just thought about it a little backwards and solved it, and it wasn't difficult." ”

"That's it!"

After Fang Shisong made sure that there was no mistake, he hurriedly spoke up to stop the classroom that began to make noise.

The men fell silent.

But Wan Zexi glanced at the question a little bored, this question was really not as difficult as the one she came up with as Principal Wang in Yunnan.

"Don't be happy yet, although this problem was solved by classmate Li Jun, but once Professor Huabo of Yunlan had such a problem, who can solve it, I have to admit that this person is very powerful."

"What's the question?"

"What's the question? Professor Fang said it and let's see how difficult it is. ”

"Don't worry, you'll know when I write it." As he spoke, Fang Shisong picked up the chalk again and wrote it on the blackboard.

Wan Zexi's originally somewhat scattered eyes couldn't help but shrink her pupils when she saw the question that Fang Shisong gradually wrote, this question she had inadvertently seen when she was a child.

When she was a child, her mother wrote this question in front of her and gave it to her father to solve.

At that time, my father only pondered for ten minutes before solving the problem.

As for how her father solved this problem at that time, she didn't care at the time, so she didn't know what her father's process of solving this problem was like.

Dear, this chapter is over, happy reading! ^0^