I just want to be a quiet scholar

Chapter 63 Calculation Ji

This game is obviously designed, the question maker has limited some conditions, and also set up traps.

A large number of calculations need to be done quickly in a short period of time.

Most poker enthusiasts can work out the results if the answering time is extended to 10 minutes.

But the young students in the math camp only have a dozen seconds, no pen, no paper, and no computer. Their only tool is their brain and their sensitivity to numbers.

"Wait a minute, give me some time, and I'll figure it out soon." Zhou Yuan's forehead was full of sweat, and it took a lot of brain cells to quickly calculate the victory or loss of this game.

"Next question!" Sun Erxiong waved his hand, and a new question appeared on the screen.

"Come on." Zhou Yu'an counted half of it, no more, no more.

Entering the mathematics major test, the pace of answering the questions is too fast, and there is no time for the students to reminisce.

Shen Qi rubbed his temples and stared at the projection screen in front of him with round eyes.

The second question is described as follows: "Scenario: There are five prisoners in the prison, and their uniforms are numbered 1-5."

"The warden brought the five prisoners to the gallows and said, I will play a game with you, and the winner will be released immediately, and the loser will be executed on the spot."

"There are 100 beans in this sack. The rules of the game are that you take turns to catch beans in the sacks in the order of number 1-5. Each person can only catch once, and at least one bean at a time."

"Listen, the person who catches the most and the least number of beans will be executed on the spot. The rest will leave alive."

"You are not allowed to communicate with each other, even eye contact is not allowed. However, when you touch the beans, you are allowed to find the number of beans left in the sack."

"100 beans do not have to be all finished. If there is a tie for the largest or the smallest, the tie will be executed together."

The topic is gone here.

The atmosphere in the classroom was extremely tense. After the first math test question, all the students understood that they only had a few seconds to quickly read and understand the meaning of the question.

After Shen Qi finished reviewing the question, he had already made up his mind.

This question is similar to the logic question in IMO. It is not a simple numerical calculation. In fact, the numerical calculation part is very simple, and the difficult part is logical reasoning.

Instructor Sun gave a scenario hypothesis but hadn't asked any questions yet. Shen Qi guessed that the question was probably who has the highest survival rate among the five prisoners?
"Students, here we come, here comes the question, please be prepared." Sun Erxiong broke the silence ten seconds later, "These five prisoners are all smart people, and their principle is to save their lives before harming other prisoners. So, please, Of the five prisoners, who has the highest probability of leaving the prison alive? I'll give you another ten seconds to think."

Ten seconds passed quickly.

Sun Erxiong said urgently: "Please raise your hand!"

brush!
brush!
This time, without a doubt, Shen Qi raised his hand first.

The second person to raise his hand was Zhou Yu'an. He was a second or two slower than Shen Qi. The instructor and assistant could clearly tell the difference with the naked eye.

After all, Zhou Yu'an is a real player who has been selected for the National Math Olympiad team. He won an individual gold medal at IMO. Although it is not a full-point gold medal, his logic ability is quite good.

"Damn..." Zhou Yuan was sitting next to Shen Qi, and he could see that he raised his hand slower than Shen Qi.

Shen Qi raised his right arm and glanced at Ou Ye who answered the first question correctly.

Ou Ye narrowed his brows and did not raise his hand.

"Shen Qi, please give your answer, which of the five prisoners has the highest probability of survival?" Sun Erxiong looked at Shen Qi.

Shen Qi said confidently: "My answer is that prisoners No. 1, 2 and 3 have the highest probability of leaving alive. In fact, it is not fair to cast lots in this order, but what is fair in the prison."

"Then Shen Qi, what is your basis?" Sun Erxiong said noncommittally.

Shen Qi explained: "All prisoners are smart people. Their principle is to save their lives first and then kill others. So prisoners No. 1, No. 2 and No. 3 have all caught 17 beans, and the three of them have the best hope of surviving. No. 4 and No. 5 are on the back, and there is no way for them to die."

"Yes, Shen Qi gets 10 points, and everyone else gets 0 points." Sun Erxiong affirmed and asked the other students, "Did you understand Shen Qi's logic?"

"oh, I see."

"Yes, that's how it works."

"Give me another minute and I can deduce it too."

The students in the math camp are all smart people. Shen Qi gave an introduction and they understood it in seconds.

"Ah ah ah, it's a pity, the answer I deduced is the same as yours, Shen Qi, and it's just a little late to raise my hand." Zhou Yuan thumped his chest and paused.

"Zhou Yu'an, you are a spit robot." Shen Qi massaged the eyelids and made some adjustments.

"As of now, Shen Qi and Ou Ye have each scored 10 points, let's move on to the next question." Sun Erxiong did not give the students any time to rest.

投影屏幕上更新一题：“今有2匹马、3头牛和4只羊，它们各自的总价都不满10000文钱。如果2匹马加上1头牛，或者3头牛加上1只羊，或者4只羊加上1匹马，那么它们各自的总价正好都是10000文钱。问：马、牛、羊的单价各是多少文钱？”

What the fuck?

This question is very, very simple.

Compared to the first two questions, the third question was so simple that Shen Qi couldn't even believe what he saw.

"The question has been released, please raise your hand to answer immediately!" Sun Erxiong said urgingly.

Swipe!

Brush brush!
A dozen arms were raised one after another.

This question is actually a list of ternary linear equations, set the unit prices of horses, cattle, and sheep as x, y, and z, and then mentally calculate the values ​​of x, y, and z.

This question is not compared to the mathematical knowledge reserve, nor the logical reasoning ability of nine bends and eighteen bends.

It is the purest numerical calculation, and arithmetic is a part of mathematics, the most basic part.

If there is enough time, junior high school students can also calculate the values ​​of x, y, and z.

The result is calculated in a few seconds, which is compared to the ability to calculate quickly.

Shen Qi lost his mind and raised his hand slowly.

At least ten people raised their hands before him.

"Ou Ye raised his hand first, ask Ou Ye to answer." Sun Erxiong said, then glanced at his assistant: "Little Qian, who did you observe to raise his hand first?"

"Ou Ye raised his hand first, Zhou Yuan was the second, Wang Sheng was the third, and the latter did not remember." Assistant Xiao Qian replied.

After the confirmation, Sun Erxiong said, "Ou Ye, please give your answer."

Ou Ye spoke at a slow pace: "Three thousand six for horses, two thousand eight for cattle, and one thousand six for sheep."

Sun Erxiong: "The answer is correct, Ou Ye will get another 10 points!"

The rest of the students had no objection to this group of answers. They calculated the same results in their minds, but the calculation speed was a bit slower.

"Ou Ye, this girl has 20 points! And I still have 0 points. I feel sorry for myself." Zhou Yuan complained to himself.

Shen Qi, who is currently ranked second with 10 points, said: "According to my observation, Ou Ye's comprehensive logic ability is estimated to be average, but her computing power is very strong and her reaction is very fast."

Zhou Yu'an: "Shen Qi, you have met your opponent. Sister Ou Ye is actually a calculating girl."

(End of this chapter)