This top-tier academic genius

Lin Yan decisively blocked Xie Nianhong without the slightest hesitation.

This person is very calculating and ruthless; he dislikes him very much.

I overheard her mention half of it on the phone just now, and it seemed like she wanted me to return to Kunle Entertainment, and her tone had a condescending feel to it.

Think beautiful!

The entertainment industry will definitely return, but it will absolutely not be Kunle Entertainment. Lin Yan dislikes the company's way of doing things and its corporate culture.

When Lin Yan returned to the classroom, most of the students were taking a lunch break, except for a few academically weak students.

For struggling students, lunch break is definitely a time for fun and play. Playing games or reading novels, isn't that great? Only in this way can they sleep soundly during class.

Lin Yan wasn't sleepy, so he simply sat in his seat and reviewed his physics textbook.

For him, it's easy to see the essence of physics, but he doesn't remember many of the simple theorems and formulas in the book, so he needs to pick up the most basic stuff again.

Not long after, soft music started playing from the classroom speakers, signaling the end of lunch break.

"Lin Yan, when did you get back? Tell me, why did Old Man Qin invite you to dinner?"

Chen Bin was the first to spot Lin Yan. He walked over with a resentful look in his eyes, clearly unhappy that he had been abandoned earlier.

This question immediately drew the attention of several classmates nearby. Teacher Qin was actually inviting Lin Yan to dinner?!

Lin Yan didn't look up and replied, "Teacher Qin wanted me to participate in the Mathematics League and treated me to a meal while he was at it."

He had barely finished speaking when laughter came from the side. Before Chen Bin could even react, laughter erupted from the side.

"What a boast! He even told Teacher Qin to let him participate in the Mathematics League! That's hilarious, haha!"

Upon hearing this, Chen Bin flew into a rage. "Zhang Yang, what are you laughing at? What's so funny?"

The one who just spoke up and mocked was Zhang Yang, a boy sitting in the other row. He had good grades and was considered one of the top students in the class, ranking in the top ten.

Just like his name suggests, he is usually a bit arrogant and conceited, and looks down on people with worse grades than him, especially Chen Bin, who is a bottom-ranked student; Chen Bin has long disliked him.

"Of course I'm laughing at people who brag without thinking. The International Mathematical Olympiad (IMO) is not something anyone can just join. It's a preliminary round of the Mathematical Olympiad. They only scored 29 points in math and dare to say they want to participate in the IMO. It's hilarious."

After Zhang Yang finished speaking, other classmates immediately joined in the laughter.

Chen Bin: "You..."

Lin Yan advised, "Forget it, Ah Bin, there's no need to argue with a fool."

"Who are you calling an idiot?! You're the one..."

Just as Zhang Yang was about to retaliate, the school bell rang, and Qin Zhengyan walked in. The students immediately returned to their seats and quieted down.

Qin Zhengyan glanced around the classroom and said, "The next class is PE, but the PE teacher has something come up, so it will be math instead."

The whole class immediately let out cries of agony.

"Quiet down. Once you get into university, you can have PE class every day. We'll give you a quick quiz during these two classes. Okay, pass it on from the front to the back."

A faint wail came from inside the classroom again.

"This test is a little difficult, so please do it carefully on your own and don't whisper to each other. Don't be afraid if you make mistakes; it's a good time to identify and fill in any gaps in your knowledge."

After receiving the test paper, Zhang Yang quickly scanned it and found that, just as the teacher had said, the test paper was indeed quite difficult.

He wasn't discouraged; instead, he became happy.

The difficult parts are good; this is how you can differentiate yourself from other students and demonstrate your math skills.

His math scores have always been good, consistently ranking in the top three of his class.

This test paper is a good opportunity to let my classmates and teachers see my level.

Thinking of this, he glanced sideways at Lin Yan, who was frowning slightly, and thought to himself with a smug satisfaction, "No way, who's the fool here? Humph!"

Lin Yan frowned as he looked at the test paper in front of him, but not because the test paper was difficult. On the contrary, the test paper was much simpler than he had imagined, and he finished marking the multiple-choice questions in just a few minutes.

He frowned because he discovered that the first fill-in-the-blank question on the test paper was wrong, and he couldn't find the answer at all.

After thinking for a moment, he picked up his pen and added a note to the question, pointing out the error before moving on to the next question.

A dozen minutes later, Qin Zhengyan left his seat and began walking around the classroom, occasionally stopping to glance at the students' test papers and check their answers.

When he got to Lin Yan's side, he stopped and took another look, and couldn't help but nod silently.

While other students were still working on the multiple-choice questions, Lin Yan had already started working on the problem-solving questions on the second page.

Moreover, the solution process was flawless, fast, and accurate!

At the 30-minute mark, Zhu Guanqun, who was sitting next to Zhu Guanqun, scratched his head, stumped by the first fill-in-the-blank question.

This is so hard, I can't do this problem!

In fact, this test paper was a bit difficult for him, and the multiple-choice questions stumped him. However, since it was a multiple-choice question, there were four options, so he could just guess one.

Problem-solving questions are different; you can't rely on rolling dice to solve them. You can only write down a random 1 or -1 to get by, just in case you get it right.

When it came to the problem-solving questions, I really didn't know how.

That's how math is; if you don't know it, you don't know it. Even if you rack your brains for ages, you might only be able to write down a "solution."

Zhu Guanqun, who didn't know how to do it, glanced at his deskmate Lin Yan and his eyes widened in shock!

Goodness, they've even gotten to the bonus questions.

He became increasingly certain that his deskmate was a true academic genius. Just now, when Lin Yan mentioned that Old Man Qin had asked him to participate in the Mathematical League, he didn't immediately doubt it but chose to believe him.

Lin Yan is working on the bonus question in front of him, which is very interesting.

In triangle ABC, AB = AC, ∠A = 30°. BD is the angle bisector of ∠ABC, intersecting AC at D. Prove that BC = AD + BD.

This problem may seem like just a simple isosceles triangle, but there are quite a few tricks involved.

Ordinary students may not understand it at all, and even math whizzes who can understand it are very likely to make mistakes.

The conclusion is that to prove BC=AD+BD, we must cut the line to make up for the short one, but there are many choices about which line to extend and which line to cut, and choosing the wrong one will lead to a dead end.

Most students who can solve this problem will first try to extend BD to make up BC, or extend AD or CD, but both of these approaches are dead ends.

Of course, you can also use the sine theorem to calculate it by brute force, but the amount of computation is so large that it can drive you crazy.

Moreover, the angles in the questions are extremely fragmented and disgusting.

内角是30°、75°、75°；角平分线分出：37.5°、37.5°；全是非整数角度，很容易算错。

Lin Yan was certain that this question was at the level of an extra difficulty question even in the International Mathematical Olympiad. The fact that Old Man Qin put this question in a regular quiz test must mean he was drunk.

However, even so, it still didn't stump him.

The key to this problem is to understand the structure and find the auxiliary points.

Lin Yan quickly drew an isosceles triangle on the draft paper and drew an angle bisector.

Then, after looking at the structure of the triangle, he decisively extended BC and took a point E on BC, so that BE = BD.

This stroke of genius made the problem instantly clear.

Before the bell rang for the first class, Lin Yan stopped writing. Instead of sitting in his seat and waiting for the end, he stood up amidst the astonished gazes of the whole class, picked up his test paper, and handed it to the podium.