Chapter 1095: Extra Story: An An Stands Outside the Window
Thinking about it, Kangkang smiled stupidly
This is a math class. The math teacher who is always tricky and weird likes to show off and often talks about things that are not in the textbooks.
"Now to expand your knowledge, I will tell you about the number of friends. Does anyone know what the number of friends is?" the math teacher asked.
This unheard term made everyone confused and shook their heads.
The math teacher looked proud and was about to speak when he suddenly saw Kang Kang who was distracted.
"Mo Kangkang," the math teacher asked deliberately, a little angry, "Can you please answer me, what is the 'number of friends'?"
After Kangkang stood up, his mind went blank.
She thought the teacher had just talked about this problem that she had never seen in books.
While she was embarrassed, Kangkang suddenly heard a gentle knock on the windowpane next to her. She glanced sideways out the window and was startled. At some point, An An was standing outside the window.
"Did you listen to the class just now? Answer quickly, what is the 'number of friends'!" the math teacher urged.
Kangkang felt extremely embarrassed when he was criticized by the teacher in front of his brother.
Suddenly, she saw An An quietly pasting the phone screen on the glass
There are several big numbers on it: 220 and 284, 17296 and 18416, 1184 and 1210
An An hid where the teacher couldn't see her and winked at Kangkang.
Kangkang understood, so he pretended to lower his head, but looked sideways at the mobile phone on the window, and read out these three sets of numbers.
After Kangkang finished reading, the teacher's eyes widened in surprise.
Even other teachers don't know much about such an unpopular question. Before I even talk about it, this little girl actually knows it.
In terms of study, although Kangkang usually works hard, his talent is average, so he is only an average student.
This performance today surprised the teacher, who turned a blind eye to her and said, "Classmate Mo Kangkang answered very well, but can you tell us why they are numbered as friends?"
Kangkang just wanted to breathe a sigh of relief, but when she heard this question, her heart began to lift again.
She looked out the window sideways again
An An had already guessed that the teacher would continue to ask questions. His fingers were flying and he was typing on his mobile phone.
"Classmate Mo Kangkang, answer the teacher? Are you memorizing these sets of numbers by rote?" The math teacher looked at Kangkang doubtfully.
Kangkang wanted to tell the teacher that he wouldn't. Just as he was about to open his mouth, An An had already put the phone on the glass again.
Kangkang has first-class eyesight and can see clearly
In order to live up to the many words typed by her brother, she read them while looking at them.
"The first person to discover the 'number of friends' was the ancient Greek philosopher Pythagoras. He discovered that the sum of the divisors of 220, 1, 2, 4, 5, 10, 11, 20, 22, 44, 55, and 110, is 284
Later, the mathematician Fermat discovered 17296 and 18416..."
After Kangkang finished reading, her math teacher was stunned and immediately clapped.
"It's admirable that a middle school student can dabble in such unpopular knowledge! My classmates, Mo Kangkang is right, these are the 'number of friends'!" After the math teacher finished speaking, he asked reluctantly, "Classmate Mo Kangkang
, how did you learn this knowledge?”
"My brother gave it to me!" Kangkang is indeed telling the truth.
"I admire your brother!" The math teacher gave Kang Kang a thumbs up and nodded, "Sit down and listen to the class. Although you have a brother who is so good at math, you should also listen carefully during class."