Genius Fundamentals

Chapter 15: affinity

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"no!"

This time, the person who refused was replaced by Lao Lin.

They stood in front of an old glutinous rice ball shop by the park, the plastic curtain dangling.

She was carrying a schoolbag, because it only reached Lao Lin's elbow. She looked up at Comrade Lin, who was tall and thin and dark, and then at the glutinous rice ball shop: "Master invites the apprentice to a meal, a teacher's banquet."

"Little friend, let's sort out what happened." Lao Lin stood with his hands behind his back, and suddenly he spoke in a calm manner, more like the old Lin she was familiar with.

"Master, you said."

"After all, you just have to answer yes or no."

"okay."

"You've been haunting me since we met."

Just as Lin Zhaoxi was about to defend herself, Lao Lin's cool eyes came over her, so she could only change her words and forcefully said, "Yes."

"You said that you pestered me because I have good quick calculation skills, and I must also do mathematics, so you want to ask me to be your teacher and let me teach you mathematics."

"yes."

"But I didn't promise to teach you math."

"yes."

"So I'm not your master at all."

"… yes."

"Then there is no such thing as a teacher appreciation banquet, let alone treat you to dinner."

"..."

Is your focus on not wanting to spend money to invite me to dinner? Lin Zhaoxi slapped her face and almost laughed. She took Lao Lin's arm naturally, and sat down on the steps without going into the store.

Lao Lin was very reluctant, but he really couldn't bear her, so he sat on the floor reluctantly, unable to stretch his legs.

"Master."

"I am not your master."

"uncle."

"I'm not your uncle."

"dad."

"..."

Lao Lin didn't speak, and took out his cigarette again.

At this time, the street lights have been gradually turned on, but the sky is not too dark, hazy. Lin Zhaoxi also couldn't understand his expression at this time, and felt that calling her father was too rash, but after so many years, she was used to the rhythm of joking with Lao Lin, and it was too difficult to change suddenly.

She took her schoolbag, took out the Mathematical Olympiad exercise book from it, and turned to the cornered page. With the help of the skylight and the light in the shop, she pointed to the questions marked with five-star difficulty and asked Lao Lin: "I don't know how to do this question, can you teach me?"

Lao Lin didn't even look at it, but said indifferently: "Tell me, why are you pestering me?"

"I want to study mathematics."

"to be honest."

"I'm going to take the Mathematics Olympiad exam next week, which is the selection for the summer camp... If I don't pass the exam..." She draws the tone.

"Don't tell a story, I'm not very interested in it."

"Summer camp is my last chance. If I don't pass the exam, I can only go to Hongxing Middle School according to the location. The school is too bad. I... my life is over... So I... I want to enter the summer camp, and then I will be sent to the experimental junior high school. Zhongshu class, the best class in the city's junior high school."

"Did you miss something?"

"ah?"

"Only the provincial champion can be admitted to the Zhongshu class without examination, but An Ning's elementary school mathematics education has always been rubbish."

"Wow, do you even know this! You just answered such a difficult question at once, especially like the 'sweeping monk' in Tianlong Babu, the 'sweeping monk' is very good." Lin Zhaoxi pretended to be stupid, secretly Ruuo explained the reason why she pestered Lao Lin.

Lao Lin had a face of "damn talking too much", but he didn't doubt him.

Because he didn't suspect him, he patted his butt and stood up, stuffing the cigarette into his mouth as if he didn't know her at all, and left.

Looking at her father's back, Lin Zhaoxi knew that Lao Lin was determined, and she was willing to talk to her before, but she didn't understand why such a lolita like her was throwing herself around in front of him.

Now I know, it’s still such a boring reason, of course I have to go.

The sky was getting darker and darker, Lin Zhaoxi knew it was time to go back.

"Master, do you live at No. 284, Zhuanzhu Lane?" Lin Zhaoxi shouted loudly amidst the noise of cars rolling over the road.

Lao Lin turned his head abruptly with a look of shock.

Lin Zhaoxi already knew the answer.

Her birthday is on February 20th, and 220 and 284 are a pair of affinities, which is the fundamental reason why Lao Lin must rent that house, which belongs to the romance of mathematicians.

She jumped up with her schoolbag on her back, waved the Mathematical Olympiad exercise book in her hand, and shouted, "See you tomorrow."

Then, without giving Lao Lin a chance to turn around and catch her, she turned and ran in the opposite direction.

The glow of the city in the distance fades, and the stars gradually rise, and everything will be fine.

Lin Zhaoxi thought.

Early morning, seven o'clock in the morning to be specific. Stepping briskly across the bluestone slabs, the sound of footsteps echoed in Zhuanzhu Alley.

Most of the people living in the alley are old people, and they have already got up to buy vegetables. The raw coal stove is full of soot smell.

Lin Zhaoxi stood in front of the door of No. 284 Zhuanzhu Lane, sneezed, and began to knock on the door.

Boom boom boom.

"Master is awake!"

Boom boom boom.

"I'm here to serve you!"

Boom boom boom.

"Open the door!"

There was no response from the iron door, which was expected by Lin Zhaoxi. Every time she knocked, she stuck to the window to see if there was any movement in the room. In the dim shadow of the window, the person on the bed had been covered with a blanket, sleeping soundly like Mount Tai, without being woken up at all.

The most difficult thing in the world to wake up is a person pretending to be asleep. She was not in a hurry, she lowered her pace, and walked to the door again. When she was about to knock on the door, someone behind her suddenly said in a sinister voice: "Get out..."

"Wow!" Lin Zhaoxi was shocked.

Sure enough, Lao Lin opened the window a little and stood by the window, his face was dark and wrinkled, and his expression was so gloomy that water could drip.

Lin Zhaoxi hurriedly turned her head and smiled, "Master, you are awake."

"No."

"Then please open the door for me, so you can continue to sleep?"

Lao Lin was expressionless and his eyes were empty. He turned around mechanically and covered his heart. Lin Zhaoxi leaned over shamelessly, and stuck her hand against the window, but Lao Lin was so sleepy that he didn't even notice her little movements, and walked numbly to the bed, covering his head with a blanket.

Lin Zhaoxi wanted to open the window little by little, but when she pulled it for the first time, the ear-piercing "squeak~ya~" sound echoed slowly.

On the wooden bed, Lao Lin collapsed and twitched.

"I'm sorry, I'm sorry." Lin Zhaoxi hurriedly apologized.

I don't know what magic power this "I'm sorry" has. It was a very soft voice, but the Chihuahua next door suddenly let out a shocking "Wow!"

Lin Zhaoxi was a little curious, and called again: "Excuse me?"

"Wow!" There was a loud noise.

"right… "

Lao Lin couldn't take it anymore, kicked his legs, turned over and sat up: "Come in, come in, come in for me!"

After finishing speaking, he slammed the door like a gust of wind, entered the yard, and opened the gate. As soon as Lin Zhaoxi probed, he was carried into the yard by the ear.

Lin Zhaoxi didn't have time to cry out for the pain. Weeds and rocks were overgrown, and she could only vaguely see a path paved with red bricks connecting the kitchen and the two bungalows where she slept. The location of the well in the yard has not changed, and it is completely different from the small courtyard full of vitality in memory. There are beer bottles and cigarette butts piled up on the ground, making it impossible to set foot.

Lin Zhaoxi stood there blankly for a while, she looked up at the sky, the sun was shining through the vines, and the leaves underneath were all withered and yellow.

This was the first time she went home since she was small. When she was at the door, she still had many beautiful fantasies in her heart, so she was very excited whether she knocked on the door or woke up Lao Lin. But seeing the real appearance inside, she felt as if she had been splashed with cold water, and felt very uncomfortable.

Lao Lin pointed to the kitchen and said three words: "Didn't you say you want to serve me, go, make breakfast."

Then he slipped on his slippers and went back to sleep.

Lin Zhaoxi didn't realize it for a while, and when she recovered, Lao Lin had already locked the bedroom door.

She also wanted to take care of Lao Lin, but she had no other choice. She got into the kitchen, and a minute later she could only get out again, walked to the door of Lao Lin's room, and timidly knocked on the door: "Master... Mi... Where is Mi?"

There was a loud bang, as if Lao Lin hit his head on the bed rail.

Lin Zhaoxi was also very guilty, she took a few steps back and wanted to run quickly.

But thinking about it wrong, she backed away and said in a low voice, "Actually, I didn't find the pot either..."

In an instant, the door opened, and Lao Lin rushed out of the door and into the kitchen without saying a word. He took out the rice and pot, turned on the gas stove, started to cook, and shouted: "I made it myself, I made it myself, can you go!"

Lao Lin had already collapsed, and really started to make breakfast seriously.

"No, master." Lin Zhaoxi looked at his father busy in the kitchen, stood on tiptoe and said, "I haven't had breakfast yet, I'm so hungry."

After speaking, she moved a small chair and supervised the work at the door of the kitchen. When the porridge was almost ready, she straightened the small stone table under the grape arbor, and directed Lao Lin to put the porridge and pickles on the stone table. Then she went in to wash the dishes, and when she took them out, Lao Lin was sitting under the grape arbor, smoking a cigarette and watching her.

She didn't call her master anymore, she filled two bowls of hot porridge and drank it by herself.

"How do you know that I live at No. 284, Zhuanzhu Lane?" Lao Lin asked suddenly when she was about to finish her porridge.

Lin Zhaoxi held the tip of her chopsticks in her mouth, took the last sip, looked around and said to Lao Lin mysteriously, "284 is a good number, Master."

"Hehe." Lao Lin exhaled a smoke ring, "How is it?"

"The number 284 is 2 raised to the first, third, or second power..."

"Have you taught cubes in primary school?"

"I'm good at self-study, master." Lin Zhaoxi smiled at Lao Lin, very proud.

"What else?" Lao Lin asked again.

"And... the combination of 284 and another number once played an important role in the history of number theory." She said, observing the expression on Lao Lin's face, and asked, "What is the other number, Master?"

There was no expression on Lao Lin's dark face. When he heard this question, he smiled: "How do I know?"

"Then let me tell you!" Lin Zhaoxi shook her chopsticks like a kid showing off a lot of knowledge: "Pythagoras once said, 'Friends are the shadows of your soul, be as close as 220 and 284' .”

"close?"

"Intimacy means that, 220 and 284, except for themselves, the sum of all their divisors is equal to the other. Simply put, although our two numbers look completely different on the surface, they constitute each other internally, so Many relatives and friends like to use these two numbers to express missing, love and so on."

Lin Zhaoxi finished speaking in one breath, then paused again, and asked Lao Lin tentatively, "Master, do you live here to commemorate someone?"

Lao Lin exhaled smoke rings, his brows and eyes were covered by green smoke, and he couldn't see clearly, just when Lin Zhaoxi thought he was going to confide in his heart, he heard him ask sharply: "But my question is, how do you know that I live here? ?”

Lin Zhaoxi put down her chopsticks, sighed, a little regretful, she said to Lao Lin earnestly, "Master, I am not stupid, if I tell you, you will drive me away again." Lin Zhaoxi smiled, "Remember to open the door for me tomorrow, See if I tell you or not?"

Lao Lin also smiled: "Then do you think I am stupid?"

"Of course not stupid." Lin Zhaoxi shook her head: "Master is..."

She originally wanted to say that Master is the smartest person in the world, but before she could say anything, Lao Lin rushed over, cupped her underarms with both hands, lifted her off the ground, and...

Throwing out the door together with people and schoolbags.

The door panel fell on her nose, Lin Zhaoxi patted her buttocks and stood up, she was fine.

She carried her schoolbag and straightened her red scarf, as if she had just left home and was on her way to school. What she couldn't tell Lao Lin was that she actually had a lot to do with 220, but because she was abandoned, the orphanage didn't know her date of birth, so they agreed that her birthday was April 1st, rounded up and easy to remember.

The author has something to say:

The sum of all the true factors of 220 1, 2, 4, 5, 10, 11, 20, 22, 44, 55, and 110 is 284; and the sum of all the true factors of 284 1, 2, 4, 71, and 142 is exactly for 220