How to break into a math book

[If there is no 3] The real focus of this sentence is actually on the word "if". The assumption of "if" is made, which proves that the 3 in this prompt really exists in this sequence.

At the end of the first round, they eliminated No. 3, but the game was still going on, which showed that the number 3 of girl No. 3 was actually not what the system called 3.

If she is not 3, then who is 3?

Tu Hua suddenly realized that all of them had been making a mistake from the beginning, and that was looking for a challenger to represent 3.In fact, 3 is not a certain person, but a universal law in this sequence.

That is to say, 3 exists in every number in this sequence.

所以其实这道题目很简单，只要给每个数字减掉3，结果就显而易见。对于现在剩下的9个数字：5、6、7、9、11、12、13、15、17分别减掉3，就会得到2、3、4、6、8、10、12、14。

If you want to find the difference among the 9 numbers that have been subtracted by 3, it is easy to find that except for 3, the other numbers are even numbers, and if you add the girl No. 3 who was eliminated in the first round, it is another Different answers.

3减掉3等于0，也就是说在淘汰3号女生之前，这10个数字减掉3之后的结果是：0、2、3、4、6、8、10、12、14。

Obviously, except for 0, 2, and 3, the remaining numbers are all composite numbers, and they are arranged in ascending order.

A composite number is a natural number that is divisible by other numbers besides 1 and itself.The classification corresponding to composite numbers is called prime number, and prime number is also called prime number, which means that for a natural number greater than 1, it can no longer be divisible by other numbers except 1 and itself.

So 2 and 3 are both prime numbers, and 0 is neither prime nor composite.

那么对于这个数列来说，真正的干扰项应该是03=3号，23=5号和33=6号。所以除了已经被淘汰的3号女生之外，另外两个处于危险位置的人就是6号涂化和5号王博宇。

Faced with this result, Tu Hua really didn't know how to say the answer.In the second round, one person must be eliminated. If he is not eliminated, then Wang Boyu will have to leave.

Tu Hua was hesitating and didn't know how to speak, Shen Siyi suddenly said: "I know what the correct answer is."

He glanced at Tu Hua, and said the sorting method of the sequence.His idea is exactly the same as Tu Hua's, and this answer is obviously the most practical reasoning at present. Although both teammates are put in danger, in order to take the overall situation into consideration, multiple choice questions must be done.

Knowing that he and Tu Hua were on the verge of being eliminated at the same time, Wang Boyu did not hesitate at all, and stood up righteously: "Eliminate me! Please vote for me!"

Tu Hua was in a complicated mood. He knew what he was carrying on his shoulders. He couldn't be eliminated, but he couldn't do it just by watching Wang Boyu sacrifice himself.

Even though "Mathematics Breakthrough" is just a game, the intervention of the virus has already given him a sense of life and death crisis, and elimination even means death.

Wang Boyu was his best friend, and he would stand up for him without hesitation when he was in danger, but at the last moment, Tu Hua had to walk over his shoulder.

"Tu Hua, you don't have to worry about it." Wang Boyu walked up to Tu Hua, patted him on the shoulder, and smiled as brightly as ever, "You used to always cover me, this time it's time for me to cover you! And I Believe in you, you will be able to clear the level and save us all from here."

"The most important thing is... After all, I caused this mess, and it's time for me to take responsibility for it."

Tu Hua frowned, and looked at Shen Siyi tangledly: "I think this idea needs to be considered, maybe there will be a better sorting method..."

"Do you really think so, Tu Hua?" Shen Siyi looked at him, "Now is not the time to act emotionally. Once the judgment is wrong, all of us will be eliminated. Sacrifice is inevitable, whether it is Wang Boyu, or even you and me Sun Wei, it is impossible for us to go to the end together."

"So you have to be decisive."

Just when Tu Hua was thinking and hesitating, Sui Li suddenly said, "Why did it become a sensational farewell party for you two?"

He raised his lips contemptuously, and looked at Tu Hua with murderous intent in his eyes: "The right to be eliminated is in the hands of all of us. Vote for elimination. Why are you two humiliating each other here?"

"I think... If you want to choose one person between No. 5 Wang Boyu and No. 6 Tu Hua..." Sui Li looked at the crowd, "No. 6 is more likely to be an interference item."

Tu Hua never expected that someone would disturb the rhythm of the water belt at this time, and only heard Sui Li say: "For the time being, we believe that Shen Siyi's reasoning is correct, then No. 5 and No. 6 may be interference items, but if his There is a problem with the reasoning, it would be safer for us to choose No. 6, after all, 6 is a multiple of 3, and he has a greater probability of becoming an interference item.”

Several other people seemed to think that what Sui Li said was reasonable, and the eyes they looked at Tu Hua became complicated.

"I don't think your reasoning is valid." Wang Boyu stood up and argued, "Shen Siyi's deduction and the problem of multiples of 3 are two independent events, and these two things do not affect each other."

"As long as his deduction is correct, whether you choose me or number 6, you can all clear the level 3%. But if Shen Siyi's deduction is wrong, and the real answer is related to the multiple of 9, then your number 12, 13, 15 Both the number and the [-]th may be interference items. So the fundamental question is whether you believe Shen Siyi's words or not."

"By the way..." Wang Boyu walked up to Sui Li and looked at him with a sneer, "This aggressive student No. 17, Sui Li, was almost kicked out because of cheating. The system has reduced the customs clearance rate by 50.00%, if you follow him to choose... the possibility of getting the wrong answer will increase by half."

Wang Boyu's move to treat his body in his own way is very satisfying. Sui Liqi blushed and had a thick neck. He didn't expect that he would be exposed one day, so he clenched his fists and wanted to hit Wang Boyu.

Wang Boyu didn't dodge, but looked at everyone with a smile on his face: "Look, am I right? He wants to hit someone again."

Sui Li's fist barely stopped in the air, and the few people who were still hesitating just now obviously changed the direction of the wind, looking at Sui Li with more or less doubts and contempt in their eyes.

Sui Li had no choice but to close his hands angrily and shut up.

Voting time is coming soon.A countdown timer popped up on the system screen, and Tu Hua saw his name and Wang Boyu's name hung on the screen at the same time, unable to make a move for a long time.

In a dazed effort, a hand stretched out from behind him and pressed the button under Wang Boyu's name.Tu Hua hurriedly turned around, only to see Wang Boyu looking at him with a smile: "Why are you making it look like you are dying? Didn't you often sell your teammates lewdly when we played games? Just like before, sell me! "

Tu Hua looked at him: "It's different this time..."

"What's the difference? Why are you so annoying." Wang Boyu hugged him suddenly, patted him on the shoulder with a smile, "Just like before, I'll call you to watch the battle."

"Besides... I did something wrong, you have to give me a chance to redeem myself."

Tu Hua stared blankly at Wang Boyu, never expecting that this guy who always knew how to make jokes could one day make his eyes feel hot.They are the most important friends, but before that, they have more important tasks to complete.

In a real moment of life and death, there is no room for such indecision.Tu Hua took a deep breath and looked at him firmly: "I will persevere until the end."

Wang Boyu was finally relieved, and put on an Ultraman pose: "Remember to kill the Quartet!"

The voting results were announced. Out of the 9 people, 6 people voted for Wang Boyu, 2 people voted for Tu Hua, and one person actually voted for No. 17 Sui Li.

Sui Li's face turned green when he saw the voting results.

The result was clear, Wang Boyu was eliminated with a high vote.Like girl No. 3, when the voting results were announced, his body slowly turned into pixel particles, and the color became lighter and lighter.

Before disappearing, he still smiled as brightly as before, and waved at Sun Wei: "When I leave the game, I'll invite you to the movies! Don't say no!"

Before Sun Wei could respond, his figure disappeared.

Only Tu Hua saw Sun Wei's red eyes, and nodded inaudibly.

The most tense moment came. They chose to eliminate No. 5 Wang Boyu, and the system will judge the result of this elimination.If the person they eliminate is really an interference item identified by the system, then they can proceed to the final round of sorting, but if they vote for the wrong person, everyone will be eliminated together.

【Ding--】

[The game continues, please proceed to the third round of sorting. 】

This proved that Shen Siyi's judgment was basically correct.After receiving the system's affirmative answer, the remaining eight people did not feel relieved, and silently arranged according to the order of the composite number plus 3 that Shen Siyi said, pinning all their hopes here.

Tu Hua stood aside and looked at the seven of them, even the always confident Shen Siyi couldn't hide his anxiety.

【Ding--】

[The sequence is correct, Shen Siyi, Tu Hua, Sun Wei, Sui Li and other eight challengers cleared the main task of the sequence. 】

The moment the system broadcast ended, everyone jumped up and clapped their hands excitedly, feeling like they were alive after a catastrophe.

Eight people were sent out of the checkpoint together.

Seeing Su Gechi who had been waiting outside, Tu Hua suddenly felt sour: "Wang Boyu... was eliminated."

Su Gechi stretched out his arms to embrace him, coaxing softly: "It's not your fault."

Only in front of Su Gechi, could Tu Hua take off all the armor on his body, and lean back for a while with peace of mind.He also ignored other people's surprised eyes, and leaned tiredly in Su Gechi's arms. The familiar temperature and breath made him relax involuntarily: "Although I know that we can't go to the end together, I'm still afraid to face him." For this parting scene. Every time I leave someone, my pressure will increase. I am really afraid that I will live up to everyone's expectations..."

"No." Su Gechi hugged him tightly, "I will always be with you."

Although Tu Hua knew that neither Su Gechi nor his teammates could really accompany him to the end, and he had to face some things alone, but hearing Su Gechi's oath-like words warmed his heart .

Who knew that what Su Gechi said was not a lie: "Due to the influence of the virus program, I can no longer follow you into the checkpoint as Mr. X, but I thought of another way."

Tu Hua raised his head and looked at him suspiciously.

Su Gechi curled his lips: "From the next level, I will enter the level as a real NPC, that is to say, I will become the NPC you meet in the game."

Tu Hua was surprised, "How...how did you do it?"

Su Gechi shrugged: "It's just tampering with a few programs. You just need to know that I will always be by your side. Although I will be subject to the role setting, I will still watch you and support you as before. .”

[Sequence level] After the main mission is over, they are directly sent to the next level.Tu Hua was only focused on talking to Su Gechi, only now did he notice that the system had issued the rules of the game.

He quickly turned on the system screen to check, this level is [reasoning and proof level], the way to pass the level is quite different from the past, it seems to echo the main line of reasoning, this level gives the challenger a total of three scenarios to choose from: Sherlock Holmes, Edogawa Conan and Hercule Polo.

These three are well-known detective characters in film and television literature. According to the system rules, they can choose to enter a scene, and the next level tasks they will face are also related to the selected scene and detectives.

Undoubtedly, the three of them will definitely choose to enter the same checkpoint, so Tu Hua hurried over to ask Shen Siyi and Sun Wei for their opinions.The two looked eager to try, as if they were looking forward to this level.

The three discussed for a while and decided to choose the Sherlock Holmes scene.

The moment they pressed the selection button, the surrounding environment changed suddenly. The quiet campus had turned into a quaint London street. There was a wooden door sign pasted on the entrance of the European-style building: 221 Baker Street.