"Today there is a wall five feet thick, and two rats wear it against each other. Pen, fun, pavilion www. biquge。 info rats are one foot a day, and mice are also one foot a day. Rats are doubled daily, and mice are doubled daily. Q: When will we meet?

This is the main content of today's talk, which means that the wall is five feet thick, and two mice, one large and one small, penetrate from both ends, the big mouse can drill a foot hole in the wall on the first day, and then double it on the basis of the previous day every day; the small mouse can drill a foot in the wall hole on the first day, and then it is halved on the basis of the previous day, so the size of the two mice can meet in a few days, and each drill a few feet of wall hole when they meet. ”

At this moment, it was Xiao Tianming who looked at the technical lecturer on the stage and talked endlessly, and the whole person became confused. He wasn't the only one who was confused, there were some other new students.

Why do two rats have to go through a hole in the wall? How could there be such a coincidence? Why do big rats burrow so much faster the next day than they did on the first day?

"Hmph, a bunch of dirt buns. "Just as a pin drop could be heard in the classroom, a discordant voice came.

Xiao Tianming turned his head to look over, but found that it was a young man in brocade clothes, with an outstanding temperament and a proud face, and his eyes were full of naked contempt when he looked at their group of classmates.

"It's really a group of countrymen, they don't have much knowledge, and they don't even know the very simple 'surplus and shortage', so they are really lonely and unheard. The brocade-clothed boy sneered.

The young man's voice was slightly louder, and the students present were all martial artists in the Fighting Stream Realm, all of whom were deaf and clear-sighted, how could they not hear him deliberately pressure to lower his voice, which immediately caused public anger.

"Hmph, what's the big deal, you have the ability, you can count it yourself!" someone said unconvinced.

"Forget it, it's such a simple question. The brocade-clothed boy said slowly, "A total of two and two-seventeenths of a day, three and eight-seventeenths of a rat burrowing, and a mouse burrowing one-nine-seventeenths, do you think I'm right?"

The rest of the students immediately buried their heads in the paper calculations, but found that the results calculated by the young man in brocade were exactly the same.

"It's amazing......" The person who looked at the young man in brocade before suddenly changed his attitude.

Xiao Tianming looked down at the pen and paper in his hand, and the books spread out on the table, as if he had encountered a big problem, and frowned.

This is also different from the Shangwu Hall in Shilong Town, where you usually need to bring paper, pens and books to class, which is convenient for lecturers to teach, and this book is only one of the technical subjects.

Nine Chapters of Arithmetic.

This is the name of the book in front of me, which has a total of 246 questions, divided into nine categories, so it is called the Nine Chapters of Arithmetic.

Today's technical lecturer is talking about the "two rats piercing the wall" problem in the seventh category, which is a bit difficult, stumped the vast majority of people, but he didn't expect to be solved by the brocade boy so quickly.

It's just that when the technical lecturer saw the face of the young man in brocade clearly, the thought that it should be like this rose in his heart.

"Everyone's starting point is different, and if it was him, then he must have received similar teachings before entering the Shangwu Hall. The lecturer of the technical department thought secretly.

"Okay, this student's answer is correct, this is a typical deficit problem......" The lecturer didn't say anything more, and began to explain the problem in this way.

Xiao Tianming hurriedly began to take notes, recording the things he didn't understand one by one, and this is what this group of students are doing, so the boy in brocade and a few people are not recording, and their expressions are a little sloppy.

Obviously, these people know very well about this so-called surplus and shortage, otherwise they would not have solved this problem so quickly.

"If I continue to stay in the Shangwu Hall in Shilong Town, I'm afraid that I won't be able to come into contact with these until three years later, and it seems that the person who teaches mathematics there is Xu Ran, the sister of Lecturer Xu Guo. Xiao Tianming remembered the lively, cute, and eccentric girl.

Xiao Tianming was also distracted.

......

Compared with the Shangwu Hall in Shilong Town, the Shangwu Hall here has adjusted the duration of the martial arts class, and the martial arts class is no longer two hours and one afternoon, but has been reduced to one hour.

The remaining hour is given to students to reinforce what they have learned.

Today's class is a boxing instructor, who is demonstrating and practicing a set of boxing techniques for the students to watch. He didn't use the true element, so no vision appeared.

This fist technique is very simple and heavy, and with one punch, there will be a series of explosions in the air, and there is a crackling sound, like the explosion of explosives.

The students who watched the lecturer's drill all looked solemn.

This is not using the true element, but it can achieve such power, you must know that even some martial artists who have cultivated the true element cannot do this.

But this martial arts instructor actually did it, if he used True Yuan, how powerful should he be?

"Fist is an extremely ancient skill, the human race did not have weapons at the beginning, so the innate fist became the best weapon, and fist is the way to exert its power. ”

The essence of boxing is strength, and making better use of one's own strength is the true meaning of boxing. The lecturer explained while rehearsing.

"This move is to bless the strength of the waist on the right fist......"

"This move is to defend against the opponent's attack, and at the same time, it can allow me to hit his chest faster with my left hand......"

Xiao Tianming looked at the scene in front of him intently, and only felt that it was an eye-opener, he had just cultivated honestly before, but he didn't know that there were so many truths contained in it.

The middle includes not only the control of the body's bones and flesh, but also the targeted attack on the body's joints and five senses.

This is the most simple set of boxing techniques, but in the practice of the boxing instructor, it has turned decay into magic and has become a set of extremely exquisite mastery.

"Okay, that's what the boxing technique is, whoever wants to come up and try it. "The boxing instructor is a rough man, about thirty years old, with bright eyes, and he is a great powerhouse who leaps into the heavens.

Suddenly, everyone was silent, this group of first-year students were all new students, and they didn't know much about the rules of Shangwutang, and no one dared to take the lead.

Because the lecturer will definitely pick thorns during the drill, if there are too many thorns, I am afraid that in front of my classmates, I will not be able to hang my face.

Xiao Tianming didn't want to go up to demonstrate, but it wasn't because he was worried about face, but simply didn't want others to know about his martial arts.

The boxing instructor shouted several times in a row, but no one took the initiative to step forward, so he had to pick one casually: "You, it's you, you are wearing a yellow close-fitting short coat over there, you come forward and play a set of boxing methods casually." ”

"You can practice a set of boxing techniques at will, just pick your best. The lecturer laughed.