"Huh?" Chen Cong suddenly became interested, grabbed the scratch paper and looked at it.

Every time the monthly exam, the test questions and the answer sheet will be distinguished, students only need to hand in the answer sheet, and the test question part will be left for students to review later, Liu Tang can remember the answer, naturally the answer will be moved into the scratch paper during the exam, and now it is copied by everyone as a standard answer, almost everyone in the class has one for proofreading.

Although Chen Cong is confident that he can win the first place in this exam, he does not deny that Liu Tang still has some strength, but he didn't expect that in a single mathematics subject, there are five answers that are different from his own, which is a bit wrong.

"What's wrong? You can't really get a lot of questions wrong, right? Ji Shengnan saw that Chen Cong's expression was a little strange, so he couldn't help but come over and ask.

Chen Cong frowned slightly, shook his head and smiled: "Are you sure this is the answer to a math problem?" How did I find out that there were three multiple-choice questions and two big questions with different answers than mine! ”

"Isn't it, you're getting so many questions wrong?" Ji Shengnan's eyes widened suddenly, patted Chen Cong's shoulder and said: "Look, I told you a long time ago not to be arrogant, what has you regressed into, three choices plus two big questions, it is estimated that you will lose more than 30 points." ”

Chen Cong couldn't help tilting his head and said speechlessly: "Please, how do you know that I answered wrong?" Maybe he's wrong. ”

"No way, these questions are the same as the answers I calculated!" Ji Shengnan responded.

"......" Chen Cong lowered his head calmly, took out the math paper from his schoolbag and took out the math paper taken the day before yesterday, and after doing the mental calculation twice according to the above questions, he raised his head to look at Ji Shengnan and said lightly: "It is estimated that you have all miscalculated." ”

"Wrong, you're a big-headed ghost, these questions are exactly the solutions that the teacher just talked about in class a while ago, are they even the teacher wrong? Oh, I remember, dead Chen Cong, you just skipped class and didn't come in those two days. Ji Shengnan suddenly narrowed his eyes and looked at Chen Cong speechlessly.

Chen Cong smiled: "Then it may really be that the teacher is wrong, if you don't believe it, I'll show you." ”

"Suzu~"

At the same time, the school bell rang and the students walked back to their seats.

Ji Shengnan also waved his hand and said: "Okay, I didn't laugh at you, anyway, it's just the next month's exam, and the teacher should explain those questions in class, just listen carefully this time." ”

“……”

Chen Cong was speechless for a while, but he didn't insist on showing her the calculations, this time the math test questions were really not difficult for him, but how could they be so far away from other people's answers?

He refocused his attention on those questions, and slowly extrapolated forward according to Ji Shengnan's answers, trying to find out where they were wrong.

At this time, the math teacher also walked into the classroom with a paper question, as usual, the paper was graded first, after all, the exam had just ended for a day, so many papers he hadn't finished grading, and the scores would have to come out tomorrow at the earliest.

And it also helps everyone to concentrate on the class, before the score comes out, many people are curious, and they will want to get the answer as much as possible, so as to calculate how many points they have scored.

"Okay, students, let's talk about the first question first, I don't need to talk about this question, it's just a score question......"

Under the opening of the math teacher, all the people in the class listened and pondered attentively, but Chen Cong still lowered his head and looked at his test papers, frowning and thinking hard, mentally calculating the questions.

Ji Shengnan turned his head, and when he saw him like this, he couldn't help touching him with his shoulder, and reminded in a low voice: "What are you still in a daze, I'll talk about the last three multiple-choice questions right away." ”

"Yes." Chen Cong answered, but his eyes never took off the scroll.

To be precise, he already knows where the misunderstandings are in the three multiple-choice questions, and he is now tackling the last two big questions.

"Okay, then the next thing is to talk about the last three multiple-choice questions, you should be familiar with it, these three questions are a combination of trigonometric functions and derivatives, and we also reviewed them some time ago...... After algerating the derivative first and then calculating the formula of the function, we can get that the unknown is equal to three ......"

A moment later, the math teacher spoke of the last three multiple-choice questions, holding the chalk and scribbling on the blackboard.

In general, these questions have a certain degree of difficulty, and once the first question is wrong, it will be miscalculated along with the next two, and the three multiple-choice questions are closely related function questions.

But the problem is that even the math teacher miscalculated, and the unknown is not actually equal to three, it should be one!

This question is very inducing, otherwise there will be no correct choice in the chosen answer.

Chen Cong shook his head again and again, if it weren't for his solid foundation and his memory had skyrocketed, he might have miscalculated this question.

"Okay, the multiple-choice part is over, do you still have any doubts?" In the end, the math teacher put down the test paper slightly, just asked casually, he has been teaching for so many years, and he feels that teaching the top class is the most easy, the students are very smart, and many questions can be understood at just one point, and there is no need to talk about it a second time.

It may take two or three classes to finish a paper in an ordinary class, but in his top class, it is often the end of one class, so after asking casually, he is ready to jump to the fill-in-the-blank questions at the back.

It's just that at this time, he suddenly saw a student in the back row of the classroom shaking his head, and he couldn't help but be stunned.

"Chen Cong, do you have a different opinion?" He asked, a little stunned.

As soon as the words came out, the eyes of the whole class also swept to the back and fell on Chen Cong, even Ji Shengnan next to him was no exception, looking at him with some doubts.

Chen Cong raised his head, was silent for a moment, and finally nodded in response: "Well, teacher, the answers to your last three multiple-choice questions are different from what I calculated." ”

The math teacher was stunned for a moment, then pointed to the blackboard behind him and said: "The detailed calculation process is on the blackboard, you compare it to see what you are wrong with, if you still don't understand, you can come and ask me later." ”

Liu Tang, who was sitting in the front row, also glanced back at Chen Cong, with a slight sneer on the corner of his mouth, and secretly said that this guy is really good at fighting, learning is simply scum, such a simple three-choice question is all wrong, the point is that he still can't understand after the teacher's explanation.

Ji Shengnan was puzzled for a while, she always felt that Chen Cong was extremely smart, why did she get entangled in these questions, after all, this is not too difficult a question.

However, Chen Cong shook his head again, raised the scroll in his hand slightly, looked at the math teacher on the stage, and said lightly: "Teacher, you have miscalculated!" ”

As soon as the words fell, the whole class fell silent instantly, and everyone's expressions suddenly froze, and they looked at Chen Cong with a calm face in amazement.