Datang: I am so happy to marry a disfigured princess!

Chapter 195 Let’s assume the unknown!
Chicken and rabbit in the same cage?This is probably a problem for some students in arithmetic.

After all, if there is no solution, it is purely based on existing methods to calculate. The average student may not even have any ideas.

Even these Ph.D.s in arithmetic were stunned for a moment when they heard the title.

Conditions are given.

There are a total of 35 chickens and rabbits with 96 legs.

How many chickens and rabbits are there?
For these PhDs in arithmetic, they naturally know the result of this problem. After all, they have studied it for many years and worked tirelessly to find the most reasonable solution.

But for Li Lizhi, she was an idiot who couldn't even do multiplication some time ago. Now she is asked to solve the problem of a chicken and a rabbit in the same cage?
Isn't this embarrassing?
Changsun Wugou frowned slightly when he heard this: "Your Majesty, this question seems a little inappropriate. It is a bit difficult for Changle."

Just now, Li Shimin saw that Li Lizhi thought the question was too easy, so he mentioned the problem of a chicken and a rabbit in the same cage.

But at this moment, I also felt that something was slightly wrong, and then looked at Li Lizhi and said: "You have passed this test."

When Li Lizhi heard this, her eyes widened immediately: "Have you passed? Thank you Aye!"

"but……"

Li Shimin changed the topic.

Li Lizhi said with some confusion: "What's wrong, Aye? Is there another test?"

Li Shimin nodded: "It's the problem of rabbits sharing the same cage. If you can solve it, all the previously half monthly money will be restored to you."

Obviously, this is somewhat tempting to Li Lizhi, who lost her small treasury and had her monthly money cut in half.

At that moment, he immediately said: "Father, please tell me another question!"

Originally, Li Shimin, after hearing Changsun Wugou's words, felt that this question was a bit difficult. After all, he could master multiplication, so counting numbers on weekdays should be no problem.

But after finishing talking about the question, I saw that Li Lizhi's expression had not changed much, and she even felt a little confident, so I made this decision.

But at the moment, Li Lizhi became excited.

Lin Heng nodded and said to Li Lizhi: "Just use equations. You should be able to do it too."

Li Lizhi immediately said: "Do you still need to remind me?"

After that, he started to write.

Li Shimin and Changsun Wugou on the side both looked at Lin Heng, and even the two doctors were a little confused.

Square.What is an equation?
It sounds like a personal name?
Could it be that we are looking for foreign aid?But at the moment, they are the only ones here, and there is no one else. And seeing that Li Lizhi has started to write, she must not be human.

Is that some kind of calculation method?

equation?Um, square shape?What the hell is this?
The group of people were confused. Li Ningxi next to Lin Heng also had doubts on her face, but when she saw that Li Lizhi was doing the questions seriously, she didn't speak at the moment.

Let the number of pheasants be x and the number of rabbits be y...X+y=35...

The child has two feet, so it is 2x, and the rabbit is 4x.

Then 2x+4x=96, joint conversion...

Li Lizhi answered seriously, while Li Shimin and Changsun Wugou in front of her looked at her in surprise.

Changle actually knows how to do it?
Although the writing is incomprehensible, it seems to be done very seriously, as if he can answer it.

This made the two of them wonder. Could it be that after studying with Lin Heng in Taixue for a few days, they could even answer the question of pheasants and rabbits in the same cage?
If this is the case, it would be a blessing!Is the problem of chicken and rabbit in the same cage difficult?It's difficult. This is a question that has troubled China for thousands of years, and it was only solved in a systematic way in later generations.

Over the years, mathematicians from past dynasties have used different methods to solve the problem, trying to find the simplest solution, but the results are not satisfactory. It seems that it is easiest to list the number and feet of chickens and rabbits one by one.

Top mathematicians can also solve it using some complex methods, but the threshold is too high for ordinary people to understand.

But for Lin Heng, this is very simple!

A system of linear equations in two variables!
How about something in-depth? Li Lizhi has been learning calculations from me for several days, and she has already begun to talk about the area and volume of shapes!
Everyone present was looking at Li Lizhi at this moment, waiting for Li Lizhi's results to come out.

After a moment, Li Lizhi raised her head.

"Twenty-three pheasants and twelve rabbits!"

Li Shimin quickly looked at the two doctors and asked, "Boy, are these answers correct?"

The two doctors were also surprised and said: "No, yes, it is indeed this. May I ask how Princess Changle calculated it?"

Li Lizhi looked at the two people with a puzzled look on her face: "Don't you know how to set up unknowns?"

"Unknown?"

After learning that Li Lizhi had solved this problem in such a short period of time, Li Shimin was overjoyed: "Changle, you actually solved it, hahaha!"

Changsun Wugou was also overjoyed: "It really worked out. Changle has made such great progress during this period."

Li Shimin laughed and said: "In that case, I will keep my word. On top of the restored monthly money, I will give you an additional [-]% of the monthly money. This should be regarded as a reward for this period of time!"

When Li Lizhi heard the news, she stood up excitedly and hugged him: "Changle knows that Aye is the best..."

Li Ningxi was quite surprised when she saw this: "Lin Langjun, you figured it out so quickly. Could it be that you knew the answer before?"

After saying this, his nose was chopped off. Lin Heng said with a dark face: "You look down on me too much. After all, I was the one who taught Li Changle during this period!"

Li Ningxi said aggrievedly: "Ning Xi, why don't you ask Lin Langjun? After all, anyone would think so if he solved it so quickly?"

Lin Heng snorted: "Since you are so good-looking and have such a good attitude, I will forgive you."

Just as he was talking, the two doctors of arithmetic came over and respectfully handed over their hands.

"Please Prince Consort Lin, please help us clarify our doubts. How did we calculate this question so quickly?"

As soon as these words came out, Li Shimin was also curious and said: "Yes, Heng'er, you taught Changle during this period, so I guess you also taught this method, right?"

Lin Heng said with a smile: "Just like Chang Le said, set the unknown number. We don't know the number of baby rabbits, but we know how many there are in total, and how many legs of the baby rabbits are there in total. clearly."

"Children have two legs, that means there are countless rabbits with two legs. Similarly, there are rabbits with countless legs. The total number is 35."

"The total number of these feet is 96. You can use the unknown number to convert. That is, 35 minus the number of rabbits is the number of rabbits. Then substitute the rabbits into the feet, and then there will be only one unknown number and the known number. .”

"The result came out naturally!"

Hearing this, both of them were enlightened and overjoyed: "I didn't expect that there was such a simple way to answer this question. I've learned a lesson!"

"I will definitely tell Jijiu about this when I get back. I'm sure he will be very happy too!"

(End of this chapter)