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Ji Shuijing took the "Ten Sisters" all the way out of Paradise Villa, and Ji Aojian wondered, "Eighth Sister, where are we going?"

The eighth sister said without looking back, "Go to my Silver Mirror Villa, the looms there have all been moved away, and the courtyard has been cleaned up." Since I have a house here, how can I let you live in someone else's house all the time? ”

Ji Aojian couldn't help but laugh when he thought of the beautiful manor mansion, which was used by the eighth sister as a processing workshop for half a year.

However, I didn't go to live in the house of the eighth sister, and I did feel more comfortable.

He asked, "Let's leave now, what about the third and ninth sisters?"

Ji Shuijing said, "I've arranged everything, and I'm here to invite you over today." The third sister doesn't allow me to see her now, so let's go first, and they will arrive later. ”

Ji Ao said, "Eighth sister, you are really an anxious child, you want to secretly hug the third sister today, and you won't wait for her to pass before you start." ”

Ji Shuijing snorted, "I want you to take care of it." ”

Ji Aojian asked again, "What about Sister Xiaotang, don't we say goodbye to her?"

Ji Shuijing said, "I already told her yesterday. That girl is now the head of the dragon, and she is so busy that she doesn't have to go to her again. Seeing how wise Miss Ben is, she hasn't built any halls, and now she has some free time to teach you, and she can also learn that heavenly book. ”

After coming to the Silver Mirror Villa, Ji Shuijing directly took him into a study, asked him to sit in front of the desk, and then took out a chessboard with nineteen lanes and two boxes of black and white chess pieces, and put them on a few.

Ji Aojian thought to himself, is it to learn to play Go to exercise his mind?

Ji Shuijing sighed and said, "I'll teach you quickly, and you can teach me quickly." Let's finish early, so that I can hurry up and go to the third sister. ”

Ji Aojian nodded, and then found that there was something wrong with her words, "Eighth sister, you are going to hug the third sister, not to soak the third sister." ”

Ji Shuijing said, "It's all about the same, you don't have to worry so much." ”

Ji Aojian said angrily, "What is the same, the difference here is too big." ”

Ji Shuijing ignored his complaints and said on his own, "The stronger a person's mind, the stronger his ability to read at a glance. ”

Ji Aojian's attention immediately focused, "What is a glance?"

Ji Shuijing said, "One horizontal is a 'one' word, two horizontal is a 'two' word, and three horizontal is a 'three' word." Xiaojian, when you see the word 'three', can you directly recognize that it is 'three', or do you have to count one, two, three horizontal to know that it is 'three'?"

Ji Ao Kendao, "Of course, I directly recognized it as three." ”

Ji Shuijing said, "You can also see the word four points of water at a glance, the word 'five' has three horizontal and two vertical, you don't need to count it once, you can know that it is 'five' at a glance, right?"

Ji Aojian nodded.

Ji Shuijing said, "This is called seeing three is three, and seeing five is five." Even ordinary people, when they see three or five of the same thing together, they can directly know how much it is without counting, which is counting at a glance. ”

She reached out and grabbed a handful of white chess pieces and placed them on the chessboard, "The stronger the mind, the greater the number that can be recognized at a glance." Xiaojian, how many pieces are there in this one?"

Ji Aojian glanced at it, "Fourteen." ”

Ji Shuijing said, "This is already much stronger than ordinary people." Most people who have not been trained in the mind see more than ten chess pieces, and the mind cannot directly know how many they are, and must be counted. ”

As he spoke, he continued to grasp the chess pieces and let Ji Aojian distinguish the number at a glance.

From a dozen chess pieces to more than 20 chess pieces, then to more than 30 chess pieces, and finally to 37 chess pieces, the boy could no longer recognize the specific number at a glance.

Ji Aojian rubbed his head and said, "The more you watch, the more you have to concentrate, it's very tiring." ”

Ji Shuijing said, "Identifying and remembering a lot of things at once, of course, it takes a lot of effort. Those who practice martial arts are physically strong and energetic, and it is good to bear this kind of consumption. If ordinary people are too strong, the damage to the body is great. ”

She said, "Like Bai Jieyuan and Su Jieyuan, they are all naturally powerful people, 100~10,000 \ small! But if you are so smart and precocious, if you don't pay attention to physical training, you will also be prone to early death. ”

Ji Aojian's heart sudden, "Won't it?"

Ji Shuijing said lightly, "Hui Ji will be hurt, and his love will not live." ”

Ji Aojian often heard these eight words, and he used to think that they seemed very reasonable, but he didn't understand them very well. Now when I hear it, I feel very vivid.

Wisdom is bound to hurt, that is, it is too smart, and the mind is extremely depleted. If you don't have a healthy body, you will inevitably hurt your body if you overwork.

Affection is not long-lived, that is, it is too deep in love, which is very damaging to the body. This is exactly why Xiao Su asked Ji Aojian not to use fierce emotions to ignite blood.

Ji Shuijing said, "How did Zhuge Wuhou leave early? It's because there is too much burden on his mind, he has worked hard and done his best. ”

Ji Aojian sighed, a smart and wise person, the mind is consumed too much, and it is indeed not entirely a benefit.

Ji Shuijing said again, "Xiaojian, your mind can recognize at least thirty-six chess pieces at a glance, which is the number of small Tiangang, this is the work of the first three yuan." ”

Ji Aojian said curiously, "Eighth Sister, can you identify a few chess pieces at a glance?"

Ji Shuijing said, "Seventy-two earth evils are no problem, if I can turn yin yang and enter the realm of the grandmaster who has heaven and earth in my heart, I can immediately see more than a hundred, and the number of heaven and earth evils will be complete." ”

Ji Aojian secretly admired it, and asked, "How much can the sixth sister see at once?"

Ji Shuijing said, "She has reached the realm of a grandmaster, the number of three hundred and sixty-five years in her heart is vivid, and she can sense heaven and earth at will, and the four seasons are temperamental." ”

Ji Aojian took a deep breath, he didn't dare to imagine the realm of the grandmaster. If you can identify the number of three or four hundred in an instant, how magical will the profound martial arts you practice be?

Sister Squirrel has already said that in Ji Yuxue's battle in front of Tiger Hill Temple, seven or eight first-class masters attacked her with their blades, but they failed to cause her the slightest injury. What kind of mental strength does it take to be able to do this between advancing and retreating?

Ji Shuijing said, "Sixth Sister's mind, if you are strong in remembering changes in the chess path, even if you don't understand the chess theory, you can defeat all the chess players who have not entered the stage." ”

Ji Aojian has nothing to say, well, the mind of the Grandmaster is comparable to some computer software.

It's hard to be happy, she holds the original encyclopedia as a necessary information and memorizes it.

"So how strong is the Great Grandmaster's spirit?"

Ji Shuijing shook his head, "It's not something I can know, wait until I find a way to find out from the third sister." As far as I can imagine, when the Grand Master arrives, he should be able to recognize four thousand and ninety-six changes at a glance. ”

Ji Aojian was speechless, full of admiration.

Ji Shuijing looked at him in a daze, and couldn't help but smile, "Xiaojian, you don't have to look like this." The mind above the grandmaster is certainly powerful, but if it is not used, it cannot be effectively used. In terms of the ability to settle accounts, there are few grandmasters in the world who can compare to me. ”

Ji Ao Kendao, "Why is that?"

Ji Shuijing said, "Your addition, subtraction, multiplication and division are not bad, do you think, if there is a grandmaster who can read a hundred at a glance, but he has never memorized the ninety-nine table, then is he as strong as you in multiplication in his mind?"

Ji Ao Kendao, "This shouldn't be as good as me." ”

Ji Shuijing said, "He doesn't know multiplication, and when he encounters a multiplication problem, he can only use it as an addition and add it over and over again." If it's within four digits, he might add faster than you multiply, but when it comes to the seven-digit or eight-digit range, he's slow to death. ”

Ji Aojian nodded clearly, a strong mind is only the basis of calculation, and it still doesn't have much effect if there is no mathematical foundation.

The eighth sister's mind is stronger than herself, but she doesn't know advanced mathematics, so she can't do calculus problems.

And the eighth sister's mind is not as good as that of the grandmaster, but her constant calculation ability is far higher than that of most grandmasters.

Ji Shuijing said, "So the most important thing is the method, and the method is the way." The foundation of martial arts practice is to seek the Tao. Internal and external skills, physical and spiritual training, in the end, are not as important as the 'Tao'. ”

With methods and knowledge, we can not only do things that others can't do, but also save more effort. The master master who doesn't know how to multiply has calculated more than 10,000 multiplications, and after it has become tens of thousands of steps of addition, he is tired to death, and the time used is terrible. Even compared to an ordinary person who can multiply, it is one on the earth and one in the sky.

There is infinite brute force in the void, there is a strong mind in the void, there is no knowledge base, there is no scientific method, it is impossible to fly into the sky and the earth, and the supernatural power is infinite.

This is just like a planet rich in resources, without the support of the technology tree, there will be no development of advanced civilization.

Ji Ao Kendao, "Well, the most important thing is to have culture. ”

Ji Shuijing pointed to the chessboard and said, "Actually, Xiaojian, your ability to distinguish numbers at a glance is not only thirty-six, you were stuck here at thirty-seven just now, and thirty-seven is a prime number." ”

Prime numbers are prime numbers, which are only divisible by the sum of one, and have no other divisors.

The eighth sister put back a piece of white chess and asked, "How many are there now?"

Ji Aojian immediately said, "Forty." ”

Hey, I can really make out the bigger numbers at a glance.

Ji Shuijing said, "Forty is a composite number, which can be divided into two twenty, or four tens, or five eights. The more ways you can divide it, the easier it will be to break it down and discern it in your mind. And prime numbers can't be divided, so it's easy to get stuck when you see it. ”

Ji Aojian suddenly said, "I see. ”

Ji Shuijing said, "As long as you figure out a way, you can quickly identify prime numbers." Xiaojian, if you see a piece of chess and don't know the exact number, but you can feel that it is between thirty-five and forty, then you will immediately know that it is thirty-seven. Because there is only one prime number in this range that you can't tell at a glance, just because it can't be identified at a glance, you should know that it's it if you think about it. ”

Ji Aojian was stunned for a moment, "Eighth sister, this method really makes sense!"

Ji Shuijing smiled and said, "Those who seek the law and seek the Tao must be good at drawing inferences from one case and bypassing others." Okay, now that I've tested your mental strength, I'm going to teach you how to improve mental arithmetic. ”

Ji Aojian was stunned, it turns out that you are only using Go to test my mental ability, so what is the method of practicing mental arithmetic?

I saw that the eighth sister took out an abacus that was necessary in every shop from the bookcase, put it in front of Ji Aojian, and said, "Let's fight." ”

Ji Aojian was stunned, "Eighth sister, is your mental arithmetic method a plan?"

Ji Shuijing said, "Of course, an abacus, addition, subtraction, multiplication and division, and the multiplication of the square, are all on it." If you are familiar with it in your hands, you will also have an abacus in your head, crackling, and you can calculate anything. ”

This, is it true that Eighth Sister, your martial arts is an abacus artistic conception?

Ji Aojian suddenly remembered, the abacus is indeed an addition and subtraction formula, and there are also corresponding formulas for multiplication and division, and within the range of constant calculation, any topic can be calculated.

"Eighth sister, are you doing mental arithmetic?"

Ji Shuijing nodded, "This is mental arithmetic." Not to mention that it is a person like you who has cultivated into a strong little three-element mind, even ordinary people who have never practiced martial arts can also play this mental arithmetic. ”

In layman's terms, mental arithmetic is to plan the disk in the mind. When the user is proficient in making an abacus, in addition to quickly finding the correct answer, he can also depict the disc style, grade and fluctuation changes of the abacus into his mind, that is, as if he has a "living abacus" in his mind.

The image of this kind of living abacus is called a "virtual disk". It completes the abacus operation in the brain through the processes of perception, image, memory, etc., so that the cāo process of the plan is fully "internalized", so as to completely get rid of the external actions of the actual plan plate, and rely on this "mental abacus" to add, subtract, multiply, divide and other calculations in the brain.

After mastering mental arithmetic, the calculation speed sometimes exceeds that of an electronic calculator, which is very fast. Often, as soon as they hear the number of questions or see the type of calculation question, the calculator can blurt out the number of answers or write them out immediately.

Ji Aojian originally knew that ancient China had such a skill of practicing abacus in his heart. Thinking about it at the moment, this is the standard method of practicing gods, and it is not the method of practicing gods in the martial arts sect.

Sure enough, there is learning everywhere in the world, and it is wonderful all the time.

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