He was followed by another invigilator, the English teacher Chen who gave them candy before the exam last time.

Teacher Yan saw Si Baiye sitting lazily on the chair at a glance, disdain flashed in his eyes, and he put the paper in his hand on the podium with a snap: "It's a math exam, please abide by the discipline of the exam room, no head to ear, no cheating, violators will cancel the test results!" ”

After putting down the scratch paper and the roll, Si Baiye glanced at the topic on it, stunned, and a strange feeling rose in his heart.

There are almost 50 points worth of questions on it, which are the same as the questions that Chi Jian told him last night.

It's too much of a coincidence, he actually guessed what will be tested in today's exam?

Thinking of this, Si Baiye was inexplicably relieved, although the topics would be known, but fortunately, the captain told him these topics last night, which made her deepen her memory.

At this time, a voice came from behind him: "Teacher, some of the questions in my paper are blurred, can I apply for a change of test paper?" ”

It was Mu Niannian who spoke, she held the paper in her hand and looked at the two invigilators with a smile on her face.

Teacher Yan saw that it was Mu Niannian, and his expression suddenly looked a lot better, and he said softly: "Yes, you can take it." ”

The exam bell rings.

Everyone started to write papers.

Mu Niannian took the scroll and walked over, and when she passed by Si Baiye's seat, the scroll suddenly slipped from her hand as if it was blown by a demonic wind.

And at that moment, Mu Niannian took out a paper ball from his sleeve from an angle that others couldn't see, and gently put the paper ball under Si Baiye's seat.

When she got up again, she had already picked up the roll that had fallen on the floor and walked straight to the podium.

"It's a bit vague indeed." Teacher Yan glanced at her test paper, nodded knowingly, and pulled out a brand new test paper and handed it to her.

"Thank you, teacher." Mu Niannian showed a lovely smile to Teacher Yan, turned around and walked back to his seat.

*

It's been an hour since the exam started.

Si Baiye put down the pen in his hand, looked at the test papers that were full of writing, and a sense of accomplishment rose in his heart.

I looked at the clock hanging on the wall of the exam room, and there was still an hour before the exam was over, which was a long time.

Thinking of passing the time, the boy picked up the pen in his hand again and turned it, checking the question by the way.

At this time, a male classmate wearing glasses at the next table suddenly raised his hand to the invigilator.

Teacher Yan got up and walked over: "Is there something wrong with these students?" ”

"Teacher, this classmate has a paper ball underneath." The male classmate pointed to Si Baiye.

Si Baiye: "? ”

What paper balls?

Teacher Yan frowned and turned to look at Si Baiye, and was a little surprised to see that her scroll was full of words.

When she looked at the paper ball under her seat again, Teacher Yan seemed to understand something, and she squatted down to pick up the paper ball and spread it out, with a math problem written on it, and the answer to two algorithms.

"Okay, Bai Ye, you actually cheated in front of me?"

Teacher Yan stared at Si Baiye with an angry smile, and she said how could such a poor student fill the test paper!

Si Baiye raised his eyebrows: "What cheating?" I don't understand what you're talking about. ”

"See for yourself!" Teacher Yan threw the paper in front of her with a snap, and Si Baiye looked at the handwriting on the paper.

It was the question that Mu Siyi gave herself in the classroom last time, and there are answers to the two algorithms she wrote below.

What's going on? How did this paper end up in the exam room?