I didn’t tell the teacher about the examination room, so I didn’t want the teachers who were already worried to worry even more.

Half an hour passed quickly, the end bell rang, and candidates came out one after another, guarding the teachers to meet them and ask about the situation.

Shi Ning was squatting on the ground, holding chalk and writing the question directly on the floor.

She squatted and wrote, and the teachers watched, "Give △abc.d as the BC moving point..." she wrote down the question completely and then drew the graphics. The teachers present were all math teachers. When they saw the questions and graphics, they were all worried about their students.

This question is not just a tricky one, quite tricky one!

The national gathering selection has always been cruel, with a slightly worse foundation, and there is a certain gap between them and other candidates. They immediately saw the best in the four selection matches.

Shi Ning began to verify, "I got into the trap in the fourth step. When I confirmed to the sixth step, I got stuck and immediately returned to check again, and found that I had made a move in the fourth step..."

"How much time has it taken from the beginning of verification to the discovery of errors?" I don't know which school's teacher asked the question, and I was a little anxious.

"It should be about five minutes, this is the last big question." Shi Ning replied, writing the correct solution on the floor with chalk and proof. Soon, there were dense formulas and numbers on the floor tiles of ten, sixty by sixty centimeters. The result was not yet proved. If you really want to finish writing, Shi Ning estimated that at least twenty-one floor tiles would be needed.

From this we can see how difficult this question is!

Shi Ning found the error in the sixth step. If the error was discovered in the middle or later, it is very likely that the candidates' mentality will be tense. They know that they were wrong, but they can't find which step was wrong.

Shi Ning had not written out the answer yet, and the teachers nodded one after another. It was OK, her verification steps were very correct.

Seeing this, Teacher Liu couldn't help but breathe a sigh of relief. Yes, yes, Shi Ning got all the previous ones right. She was right in such difficult questions, and the other questions should be right.

"It seems that this year's questions are more difficult than in previous years."

"Oh, it's better to be a little more difficult. I have failed several times before and missed the gold medal. The problem this time is difficult, it depends on the candidates themselves."

"I'm afraid that many students will make mistakes in this big question. The fourth step is easy to make mistakes, and to the sixth step... it's actually difficult to find a mistake. Once you don't find it, it will collapse in the future."

Looking at the questions that only half of the answers were written, the teachers did not ask Shi Ning to continue writing. They waited for their students to come and see if there was anything wrong with them.

Teacher Yu brought all the candidates in Nanzhou, Lu Shian and Xi Qinghuan walked together, and the two were having a low voice.

The candidates in high school groups in other provinces were also whispering, and the most discussed topics were the last big questions.

"You go and see Shi Ning's verification in Anyang Middle School. She found a verification error in the sixth step before. She immediately went back to check and found out that she had made an error in the fourth step of verification formula. You go and see if you have made the same mistake."

A teacher hurriedly passed by Lu Shian with three students. Lu Shian quickly raised his eyes and looked forward. He saw a teacher in front of him, and the students surrounded him, as if he was looking at something.

Xi Qinghuan raised the corners of her mouth slightly, then pressed her down, and said indifferently: "It seems that all three of us almost made the same mistake. Fortunately, we had done similar questions before and found the problem in time."

The three of them had done similar questions at Anyang Middle School. Because of this, Lu Shian and Xi Qinghuan both discovered the mistakes in time and corrected them immediately. Otherwise, there would be a very likely mistakes this time.
Chapter completed!