The whole family travels through time and space, and the three of them struggle together

The one teaching the counting sticks class was Master Tian. The two of them had met last time when Master Tian was teaching poetry appreciation, and it was such a coincidence that this time, it was still her class.

Teacher Tian didn't directly agree to Zhuang Xinyan's request, but instead looked at Zhou Sisi. "Student Sisi, Zhuang wants to challenge you. This is permitted according to school rules. Do you accept the challenge?"

Teacher Tian had a good impression of Zhou Sisi and knew she was a good calculator. However, Zhuang was known to be a bit too picky, and Teacher Tian had heard about this. So, in the spirit of "less is more," she decided to consult Zhou Sisi. If she didn't want to accept the challenge, she would excuse it by saying it would delay her class and ask her to find another time.

Unexpectedly, Zhou Sisi wasn't afraid of Zhuang Xinyan. Instead, she agreed with a smile, "Sure! How do we compete?"

Now, even if Master Tian wanted to help her, he couldn't. So, Master Tian had no choice but to agree to Zhuang Xinyan's request and announced, "Since Sisi doesn't object, let's learn some math skills from Sisi and Zhuang! However, the time limit is 15 minutes! We still have to continue studying the class content later."

When Zhou Sisi heard the time limit was fifteen minutes, she figured there wouldn't be many questions, so she was fine. She probably didn't have much room to develop her skills on questions like the chicken and rabbit cage.

After Master Tian finished his announcement, Zhuang Xinyan took out a piece of paper from her sleeve. Everyone saw that she was well prepared. The paper was covered with densely packed words. Could it be finished in this quarter of an hour?

"This is the question I gave. To save time, I wrote it down in advance. Sisi, all you have to do is answer it."

Zhou Sisi smiled when she saw it. She didn't give the question to Zhuang Xinyan, but Zhuang Xinyan gave it to her.

There were only two questions written on it. The first question read: "Now there are pheasants and rabbits in the same cage. There are thirty-five heads on the top and ninety-four legs on the bottom. How many pheasants and rabbits are there?

The second question is an addition question, "What is the sum of one plus one thousand?"

After reading the question, Zhou Sisi smiled and said, "Are you sure you can test me with such a simple question?"

She had already mastered these two questions in elementary school, and I thought Zhuang Xinyan could prepare a very difficult question. It seemed her math skills were just so-so.

Zhuang Xinyan thought Zhou Sisi couldn't answer and was just bluffing, so she said confidently, "Just these two questions, no need to change them! You can come up with your own questions!"

When Zhou Sisi saw that she was asked to come up with questions, she smiled and thought to herself, since you want to be destroyed so much, I will help you do it again.

She also took out a piece of paper and quickly wrote down two questions. However, in everyone's opinion, her questions were too random!

The first question was to fill in the blanks. It just said: Please fill in the same number in the circle, and then she started to circle.

One circle + two circles + three circles + two circles + one circle, the sum equals eight hundred and ten.

She did manage to write a few words for the second question, but everyone thought it was just casual writing. The question was: There is a tray of buns. If the father eats eight, the mother eats ten, and the son eats fourteen, and the three of them eat together, they will just finish the food. How many buns are there?

After finishing it, he handed it to Zhuang Xinyan and said, "You calculate it."

Zhuang Xinyan looked at the questions she wrote. Seeing that she wrote them so casually, she didn't think they were difficult.

Seeing that both of them had accepted the question, Master Tian announced, "The answering begins." After saying that, she also lit a stick of incense.

Zhou Sisi was puzzled when she saw her burning incense. Master Tian saw that she didn't understand, so he explained, "When women's studies have challenges, they are usually limited to a quarter of an hour. This stick of incense is exactly a quarter of an hour."

Zhou Sisi understood. It seemed that such challenges happened frequently in the women's school. Therefore, the teacher always had them ready for timing.

Seeing that Zhou Sisi was not in a hurry, Qi Xinrui hurriedly urged her, "Sisi, answer the questions quickly!" Didn't she see that Zhuang Xinyan was writing and drawing there.

Zhou Sisi… “Okay, I’ll write the answer right away.”

As soon as she finished speaking, all the students, including Master Tian, ​​were stunned. No calculation is required?

Zhou Sisi didn't explain and wrote down the answer in just a few strokes.

The answer to the first question is: Pheasant twenty-three, Rabbit twelve.

The answer to question 2 is: Five hundred thousand and five hundred

Zhuang Xinyan was still calculating diligently. By the time the incense stick burned out, she hadn't answered either of the two questions.

Seeing this, Zhuang Xinyan hurriedly shouted, "That's not fair! You must have seen the answer to this question before, so you can just write it out!"

After hearing what Zhuang Xinyan said, Master Tian frowned. "Student Zhuang, don't be so unreasonable. Before the competition, you were full of confidence. Now that you've lost, you're blaming Sisi for knowing the answer beforehand. That's unreasonable."

Zhou Sisi also responded with a smile: "Student Zhuang, these two questions are just basic math. You don't need to know them in advance. Once I tell you, everyone will be able to do them!"

Zhuang Xinyan: "I don't believe it!"

Her two followers, Jiang Duo and Gu Yuwen, also said, "We don't believe it either."

The other students who hadn't figured out the answer also started to comment: "I didn't figure it out."

“I didn’t make it either.”

Seeing this, Master Tian said to Zhou Sisi, "Sisi, why don't you share your ideas for these questions with everyone."

Seeing this, Zhou Sisi didn't hide it and said, "It's actually very simple.

For example, consider the chicken and rabbit cage. The chicken has two legs, and the rabbit has four, for a total of thirty-five legs. If both the chicken and the rabbit simultaneously raise their legs, there are seventy legs. The remaining legs should be the rabbit's two legs. Therefore, ninety-four minus seventy, divided in half, equals twelve, so there are twelve rabbits. Thirty-five minus twelve gives twenty-three chickens.

The second question is even simpler. The sum of the first and last numbers is one thousand and one. There are five hundred one thousand and one numbers in a thousand. The product of the two is the answer to this question, five hundred thousand and five hundred.

As for the two problems I gave, they're also very simple. In the first problem, since they're all the same number, the sum of the five digits in the ones place must equal zero. Of the nine numbers from one to nine, the only ones that can equal zero when added five times in a row are two, four, six, and eight. The sum in this problem is eight hundred and ten, so the hundreds place must satisfy eight, and the ones and tens places require a carry. Therefore, none of the three numbers, two, four, or eight, are correct! So, the only possible answer is six.

As for the second question, it is also easy to calculate. If a family of three eats alone, there will be eight, ten and fourteen left respectively. If three people eat from the same tray, they can finish it all.

In other words, if there are three drawers of buns, and the parents and son share one, the sum of the remainders is two drawers, which is eight plus ten plus fourteen. Divide this into two, and each contains sixteen buns. Aren't these questions simple?

After she said this, everyone thought about it and realized it was true! No problem was difficult. As long as you turned the corner, the problem would be easy to solve.

The students began to murmur, many expressing disdain for Zhuang Xinyan's actions. She claimed to know the answers beforehand, even though Zhou Sisi could solve these problems in minutes. She didn't need any answers!

Master Tian coughed lightly and said seriously, "The result of this competition is clear. Sisi has won. I hope Zhuang will not easily provoke disputes in the future and should focus on his studies."

Zhuang Xinyan bit her lip, glared at Zhou Sisi fiercely, and returned to her seat in shame.

Zhou Sisi was calm and composed, and gave Qi Xinrui a victorious smile.

Master Tian nodded with satisfaction, "That's all for today, let's continue with the class!"