Li Yuhang was completely dumbfounded.

Since he was a child, he has also been a top student, and he often participates in some competitions and so on.

If it weren't for his abnormal performance in the high school entrance examination, he would be in the intensive class by now.

However, what Lu Fan said also caused a great impact on him.

First see the correct answer at a glance, and then put a few related formulas, the problem is solved?

What kind of operation is this?

Li Yuhang had a feeling that although I didn't understand what he was talking about, he still felt so powerful.

It's not that easy to fool around.

"It's like the truth, who are you trying to fool? Who knows if you just peeked at the correct answer and pretended to be here!"

What can see the correct answer at a glance is simply a fantasy, she doesn't believe it at all!

"A low IQ limits your imagination. Lu Fan glanced at her, and then turned his head to look at Li Yuhang.

"Do you understand?"

"It seems to be a little clear, and it seems to be a little less clear. Li Yuhang's expression looked as if it was a little painful.

He faintly felt that the method Lu Fan said seemed to be really usable.

Anyway, the solution to the big problem in science is to list the formula first, and then substitute the numerical value to calculate the correct answer.

When many people see that they can't do a big problem, they will write a few formulas and rub a little bit of it.

What Lu Fan said about first seeing the answer and then writing a few formulas casually is indeed a very simple method, which can save a lot of time in doing problems.

However, the prerequisite for using this method is that the answer must be visible at a glance!

Who can see the answer to all the big questions at a glance?

Li Yuhang felt that this was a very unrealistic thing, he thought that physics was very good, but even if it was a normal question, he rarely could see the correct answer at a glance, let alone these Olympiad questions.

"Looks like your IQ isn't as high as you think. Lu Fan said with a smile.

Li Yuhang's face immediately turned red, all the way to the base of his neck.

The reason why he blushes is because he thinks that this method seems to be really useful, but at his level, it seems that it is difficult to use this method.

If he thinks it's all, he's not going to blush.

Li Yuhang's mother quit.

If Lu Fan just said that her IQ was not good, she wouldn't be too angry.

But her son is her sweetheart, and she has always been proud, and she has always felt that her son is one of the smartest people in the world.

Now her son is said to be not IQ high enough, which is absolutely unbearable for her.

"What nonsense are you talking about? Do you think you can deceive us by using these little tricks? I'm telling you, it's impossible! You're just a trick! We won't believe it at all!"

Li Yuhang's mother was like an enraged hen, glaring at Lu Fan, and she wanted to rush up and scratch Lu Fan a few times if she didn't agree.

"Is there any benefit in lying to you?" Lu Fan sighed.

He didn't bother to explain to the two of them, but when he saw his sister who was stunned on the side, he felt that it would be better for him to explain again.

At the very least, I have to let my sister accept all this!

"If you don't believe that I haven't read the answers, you can find any questions on this exercise book and test me to see if I can see the correct answer at a glance. Or find another exercise, I don't care. ”

Lu Ling was indeed confused.

From the bottom of her heart, she felt that she should believe in her brother.

It was her brother, the brother she had trusted since she was a child, and she had no reason to suspect him.

However, the method Lu Fan said was too difficult for her to accept.

Can you see the right answer at a glance?

So what is it that she can't figure out the answer for hours?

It's unbelievable.

Faced with other people's doubts, Lu Fan could ignore them.

Anyway, no one else can do anything to him, and he won't let him eat one less bowl of rice.

But if his dearest sister also had doubts about him, it was something that Lu Fan absolutely didn't want to see.

So, when he saw a look of doubt on his sister's face, he decided that he must prove his abilities well, no matter what.

What's more, such a simple thing doesn't require any effort at all, and it's easy to do.

Lu Fan directly put the Olympiad question in front of Li Yuhang, and signaled that the kid could find the question to test him.

Li Yuhang hesitated for a moment, and then opened the question book, as a scholar, even if he wants to test others, he has to pick out a few decent questions.

He looked at it for a while and found a few questions.

These questions are all questions that he has studied and felt that he has made a lot of detours in the process of solving the problems.

You can see the correct answer at once for a straightforward question, but it is impossible to see the answer at once for such a winding question, right?

Of course, limited by knowledge, Li Yuhang's pick-out questions will definitely not be the most difficult ones, these questions are already the most difficult topics in the knowledge he has mastered.

Li Yuhang felt that if even Lu Fan could simply see the answers to these questions at a glance, it would be amazing.

"Are these questions?" Lu Fan glanced at the questions Li Yuhang had found, and then laughed, "This is all the knowledge of the first year of high school, are you sure you want to use such a simple question to test me?"

"Aren't you afraid?" Li Yuhang's mother couldn't stand Lu Fan's contempt for his son, and couldn't help but shout again.

"What's wrong with the questions of the first year of high school? You can't do the questions of the first year of high school, what are you doing the questions of the second and third years of high school?"

"I only have the physics knowledge of the first year of high school, and I can only rely on you within the scope of my knowledge. "Li Yuhang is quite honest.

"Okay. Lu Fan nodded, and then looked at the topic.

Because physics questions have to describe a lot of things, each big question is generally not very short, and at least there must be a hundred and eight crosses.

Lu Ling also leaned over, wanting to follow his brother and try to solve those problems together.

Although she also knew that with her level, she would definitely not be able to help, but she still wanted to do her part.

Either way, she's on her brother's side.

However, the results will always disappoint her.

Lu Ling wanted to do her part, but she found it difficult for her to do so.

A 100-word question, just to read it and understand the problem, it takes her a minute or more. However, before she finished reading the first line, Lu Fan had already reported the answer, and then began to read the second question.