How to break into a math book

The 24-point game in the traditional sense is to connect four numbers into an equation through four arithmetic operations, and the final result is equal to 24. This is the most common puzzle game in mathematics.

Paintables aren't very good at this game.

【5,5,5,1】The four numbers seem very simple, but he still has no way to form them into 24 points. The 2 minutes passed quickly, and a thin layer of sweat broke out on Tu Hua's forehead. To be honest, he had never been so nervous in the final exam.

The young teacher on the podium began to remind: "There are still 15 seconds..."

Tu Hua gritted his teeth and wrote a few random symbols to connect the five numbers, but the result was not equal to 24.He is not used to leaving the topic blank, even if he knows his answer is wrong, he still has to write it.After all, the exams he has experienced only have two results: scoring and not scoring. If he writes wrong, he will not get points, and if he writes it blank, he will not get points. Maybe he can get emotional points if he writes it up?

Soon, time is up.The four of them put down their pens at the same time, and Tu Hua secretly glanced at the three people next to him. The first guy wearing glasses seemed to be full of confidence, while the second guy with the crew cut was frowning, probably like Tu Hua, and didn't answer.Then look at Sun Wei sitting next to him... Well, this high-cold academic bully is still expressionless.

"Let's check everyone's answers!" As soon as the teacher finished speaking, red marking words began to appear on the white paper.There was a big red cross next to Tuhua's title, and two red words [Error] appeared below it.

Immediately afterwards, everyone's answers and comments floated up from the white paper, and were displayed in front of everyone like a projection. Everyone could see each other's answers and comments, and the paper that had just been written on the table, It becomes blank again.

The first thing Tu Hua saw was Sun Wei's answer.As expected of a top student, Sun Wei's handwriting is very neat, and there is no trace of alteration. There is a red tick next to it, and two big characters [correct] are written below it.

[5*(5-1÷5)]

Sure enough, it is 24 o'clock! 1÷5 is one-fifth. Most people are only used to the addition, subtraction, multiplication, and division of integers when performing 24-point calculations. Being able to use decimals and fractions is considered a high-level game.Tu Hua couldn't help admiring him.

Look at the crew-cut boy next to Sun Wei. His test paper is blank, and he didn't write the answer, and he didn't mark the information, which is very strange.

The answer of the first boy wearing glasses was the same as Sun Wei's, and was also marked with a red tick.

"I'm sorry, Li Guowei," the teacher shook his head at the second boy with a crew cut, "You're going to be eliminated."

The short-haired man Li Guowei was startled, his eyes widened and he said: "Didn't you say that you can choose punishment? I choose punishment!" If you pass the punishment, you can enter the next round smoothly.

The teacher called up the system rules and explained: "The rules say [challengers who answer wrongly can choose to accept punishment]. You didn't answer wrongly, but didn't answer. This is equivalent to abstaining."

Li Guowei still wanted to justify something, but in the next moment, his body slowly faded like pixel particles, and finally disappeared.

Tu Hua breathed a sigh of relief, fortunately he wrote an answer casually.

"Then it's up to you, classmate Tu Hua," the teacher looked at him with a smile, but Tu Hua always felt that this person's smile looked malicious, "How do you choose? Punish or eliminate?"

Tu Hua took a deep breath and carefully recalled the rules given by the system.Judging from the performance of Li Guowei just now, this game system is very rigorous, but the more stringent the wording, the easier it is for there to be unreasonable gap rules, that is, some loopholes that seem deviant.

[The challenger who chooses to punish will enter the next round of the game after the punishment]

[The third round of correct answerers clears the level]

These two seemingly ordinary rules gave Tu Hua a different message.First of all, if he wants to clear the level, there is only one way to choose, and that is to answer the third round correctly.In the third round, there is no penalty option, that is to say, if you answer correctly, you will pass the level, and if you answer wrong or do not answer, you will be eliminated directly.

The second point is the sentence [Enter the next round of the game after the punishment].He doesn't know what kind of punishment this is, but what can be guaranteed is that this punishment can be accomplished by the challenger.According to the rules of the general game, even a reduction in points or some special item punishment is more cost-effective than elimination.

So Tu Hua resolutely said: "I choose to punish."

The teacher raised his eyebrows and looked at him: "Okay, then you will be punished for 10 minutes. If you find it difficult to accept the punishment, you can stop at any time. You can go home safely like Li Guowei."

Tu Hua: "I won't tell you to stop."

In the next moment, the originally quiet classroom suddenly turned into a dark and damp virgin forest, with no end in sight. The other two challengers and the NPC teacher who were still in the classroom just now also disappeared, leaving only Tu Hua.

The air was damp, and the ground was covered with weeds that grew up to the height of his calf. A few smaller plants got in from the painted trouser legs and scraped his ankles.The trees were so dense that they almost completely blocked the sky, Tu Hua reached out and touched the trunk next to him, wet with dew.

This scene is so realistic.Tuhua has never experienced such a real holographic game. The early games needed to be played with somatosensory equipment. Later, more convenient facilities such as optical brain chips appeared. But what about "Mathematics Breakthrough"?How does it allow challengers to enter the virtual world?Could it be that the blue light was sensed by the optic nerve connection center when he wrote the name?

He had to marvel at Su Gechi's ability. He didn't need equipment, and he could experience such a shocking scene with just a book. This person deservedly is a leader in the game industry.

Soon, the noise from the other side of the jungle pulled back Tu Hua's distracted thoughts.When he saw the source of the noise clearly, he finally understood what the NPC teacher meant by "go home safely".

It was a tiger.

It has yellow and black stripes all over its body, and white-gray hair extending from its cheeks to its abdomen. It lowers its head slightly, and walks cautiously toward Tu Hua.

Tu Hua couldn't help taking a step back.

Seeing that he was afraid, the tiger obviously quickened its pace and got closer and closer, with only a distance of more than ten meters. It was vigorous and huge, completely different from those domesticated tigers in the zoo. You can smell the fishy smell on it.

The more nervous you are, the more you need to keep calm.Tu Hua stared at the tiger, his brain spinning rapidly.At first, he thought it was just a game, and no amount of punishment would cause any damage to the challenger's body.

But now I can't guarantee it.The touch is too real, he can touch the water on the tree trunk, which proves that if the tiger comes to bite him, even if he can't die, it will make him feel real pain.

He didn't dare to take the risk, and even had the idea of ​​calling a stop.

Soon the tiger had already walked in front of him, and Tu Hua leaned his back against the tree trunk, thinking that if the tiger made any aggressive moves, he would stop immediately.

But the tiger didn't grin at him, but sniffed curiously with its nose up, and looked up from time to time.

That looks very much like Tu Hua's Fat Orange.

Tu Hua has an orange cat that he has raised for five years, and he has a very good relationship with him, and he is always tired of him.Every time Tu Hua went to the park to feed stray cats and came back, Fat Ju would sniff left and right like this, as if to say "you went to find other cats behind my back again".In such a situation, Tu Hua would usually reach out and scratch Fat Ju's chin, and Shamao would immediately soften, twist its fat body and crawl into his arms.

Cats and tigers... are both cats, so there shouldn't be a big difference, right?So Tu Hua made a bold decision, slowly stretched out his hand, and placed it on the jaw of a certain beast.

Tiger paused, staring blankly at Tu Hua.

Tu Hua's heart was beating wildly, afraid that the tiger would bite off his wrist, but seeing that the tiger didn't respond impulsively, he tried to rub the fluff on the tiger's chin with his fingers.

The majestic vertical pupils softened in an instant, the tiger's eyes were half-closed, and a comfortable grunt came out of his throat.

Tu Hua was stunned, he!Actually!fucked up!a tiger? !

Although there are ten thousand grass and mud horses galloping past in my heart, I dare not neglect the movements of my hands in the slightest.The tiger felt very comfortable, and even moved closer to Tu Hua, rubbing his arm with the top of his head.

At first, Tu Hua, who thought he was going to die in the tiger's mouth, was patting the tiger with both hands.

He had to think about the purpose of this punishment.Tigers are not supposed to be docile animals. If Tu Hua met such a fierce tiger in real life, he would not dare to pet him no matter what. A fierce beast is not a pet, and its habits are completely different.

This can only prove that in this penalty setting, masturbating tigers is a safe answer.

Tu Hua seemed to understand Su Gechi's intention of setting up such a punishment.For tigers, people's inherent cognition is that they are scary, ferocious beasts, and they should run away as soon as they encounter them, but how many people can really escape from the tiger's mouth?In the face of unknown difficulties and fears, finding another way may be the fundamental way to solve the problem.

He wanted to compare mathematics to a tiger, and boldly masturbating the tiger is the way to solve the problem.

Tu Hua raised his lips. It seemed that the game "Mathematics Breakthrough" was very suitable for him.

The 10-minute masturbation time ended quickly. When Tu Hua returned to the classroom, both Sun Wei and the man with glasses looked at him in shock.

Tu Hua was puzzled: "What's wrong?"

"It seems that Tu Hua enjoys this punishment very much." The teacher gave him a meaningful look, and then said, "Now let's start the second round of tests!"

Immediately, four numbers appeared on the white paper on the table, also within a time limit of 2 minutes.The question this time was relatively simple, and Tu Hua could tell the answer at a glance, as did the other two, and the man with glasses curled his lips, as if disdainful of the difficulty of the question.

After passing the second round smoothly, we will soon enter the third round.

Tu Hua held his breath and concentrated. He was not as optimistic as the man with glasses. If it was only this difficulty, there was no need for this level to exist. Students who can come here have a pass rate of at least 90.00% for this kind of problem.

Sure enough, the numbers in the third round were extraordinary.

【0,0,0,0】

Four zeros, according to the 24-point algorithm, are impossible to set up anyway.Not only Tu Hua was surprised, even Sun Wei frowned.

The man with glasses couldn't hold back even more, raised his hand and shouted at the NPC teacher: "This question is wrong! It must be wrong! How can four zeros form 24 points?"

The teacher showed an intriguing smile: "You think it's wrong, it's just that you don't know how to do it."

The man with glasses blushed immediately, and lay down on the table without speaking.

There are no mistakes in the problem, but the solution method is different.Tu Hua called up the system rules interface, and studied it carefully again: [A total of three rounds of 24-point games will be played, and the elimination mechanism will be implemented...]

The rules only say that the 24-point game will be played, and do not explain the game method.What exactly is 24 o'clock?What everyone thinks is 24 points is the simple calculation of four numbers to form 24. When it comes to 24 points, everyone will use the same method to solve the problem.

However, this game does not give its so-called 24-point algorithm. 90.00% of people think that nine is the four arithmetic operations of addition, subtraction, multiplication and division, but Tuhua is that one percent.

Tu Hua smiled, and quickly wrote down the answer on the white paper.The rules don't say what is right, so there are infinite possibilities for solving the problem.

2 minutes is over quickly.

The answers of the three people were alluded to the air again. This time, the judgment was not given directly like the previous two rounds, but the NPC teacher first commented.

The man with glasses is a blank roll, and at this moment he still looks angry and unfair.

The teacher passed him directly and commented on Sun Wei's answer.

Tu Hua was also shocked when he saw Sun Wei's answer, Xueba is indeed a Xueba, he is really talented!She actually used factorial!

阶乘法则在数字符号中的表示是一个感叹号，1的阶乘就是【1！】，运算方法就是1×1；3的阶乘就是【3！】，运算方法是3×2×1；也就是说任何一个正整数的阶乘，就是所有小于等于这个数的乘积。而0的阶乘，则直接被定义为1。

So the answer given by Sun Wei is [(0! +0! +0! +0!)! 】

四个0的阶乘相加，即四个1相加等于4，4再进行阶乘，即4×3×2×1=24。

Factorial does not belong to the category of high school mathematics, and Tuhua was seen in a computer science book a long time ago.Unexpectedly, Sun Wei came up with such a difficult method in such a short period of time, which is indeed admirable.

Even the NPC teacher showed approval in his eyes: "Student Sun Wei's answer is correct."

The red tick slowly emerged, and the word [Correct] was very dazzling.But as cold as Sun Wei, there was still no expression on his face.

Then came Tu Hua's answer.

When the man with glasses saw Tu Hua's answer, he laughed exaggeratedly: "What the hell, dare to write such an answer? This is a math test!"

Tu Hua ignored him, but Sun Wei took a look at him, and immediately silenced the man in glasses with his sharp eyes.

The NPC teacher kept silent, staring at his answer.

Tu Hua felt nervous, always felt that this NPC was a bit strange, as if he was looking at him through a screen of nothingness.Who knew that the NPC actually laughed, with a beautiful arc on the corner of his mouth: "Student Tu Hua, do you think your answer is correct?"

The painted face did not change color: "Of course it is right. This is 24 points."

Tu Hua's answer is as serious as his expression: [00:00]

Isn't midnight at 24 o'clock the previous day?The rules only say that the 24-point game is to be played, and it does not say whether the 24-point is a number 24 or a time 24-point.Tu Hua felt that his answer was absolutely fine, and he was [-]% confident.

Finally, the NPC teacher nodded: "Student Tu Hua's answer is correct."

"How is it possible! What the hell..." The man with eyes jumped up and yelled, blushing anxiously, but he didn't jump for too long before he turned into pixels and disappeared.

The NPC stood on the podium, looking at Sun Wei and Tu Hua with a smile: "Student Sun Wei and Tu Hua, congratulations, you have passed the 24-point game level."

"This is a reward for you," Tu Hua didn't know if it was an illusion, but he always felt that this NPC looked at him strangely. The NPC waved his hand, and his figure became fainter and fainter, and gradually disappeared, only to hear him say before disappearing, "Teacher is optimistic about you."

"Ding--"

After the beep, the system interface pops up:

[Congratulations on clearing the 24-point game level and getting the reward Mr. X's favorability +5]

Tu Hua looked confused: Mr. X's favorability, what the hell is this?

The author has something to say: You are always attacking the favorability, don't you want it?