Chapter 104: 1 interesting math problem

　　 "Today, let's do an interesting math problem!"
　　 While talking, Old Tang drew a 55 grid on the blackboard.
Old Tang pointed to the grid on the blackboard and said, "The requirements of the title are like this. In this 55 grid, fill in a total of 25 numbers from 1 to 25. Make every row, every column, and every one of his The sum of 5 numbers on the diagonal is equal!"
　　 "Does everyone understand the question? It is for every row, every column, every diagonal line, and the sum of twelve groups of numbers to be equal, to complete the question." Old Tang continued smilingly. "This is a problem that radiates thinking. It doesn't require complicated steps to solve the problem. Everyone can try it. The first one to be done will have the priority to get the math simulation paper I just finished! And myself Free review opportunities for you!"
　　 The corners of everyone's mouth twitched.
　　 Teacher, your reward is a bit... fresh and refined!
　　Although they are not interested in the reward proposed by Old Tang, it does not stop them from seeking knowledge on this subject.
　　 25 consecutive numbers, fill in a 55 square.
　　 In terms of possibility, there are 1.5511210043331×10^25 possibilities.
　　 If you try one by one, it is definitely a lifetime series.
　　 Therefore, we must find another way. Use divergent thinking to think about problems.
　　Simple problem-solving methods must exist, depending on whether they can think of it.
　　 Mu Lengqing frowned, looking at the 55 grid drawn on the draft paper in a daze. There was no clue in his head.
　　 "What is the law?" Mu Leng whispered softly.
　　 And Su Xiaoxiao, who was sitting on the side, didn't hold on to the solution to this problem at all. His big watery eyes blinked and looked at Mu Leng.
　　 "Mu Leng, do you have any ideas?" Su Xiaoxiao looked forward.
　　 Mu shook his head with a cold smile, "There is a mess in his head, there is no clue at all."
　　 "Huh? Is this question so difficult?" Su Xiaoxiaoqing, as a scum from elementary school, all the questions are difficult, so I don't feel anything.
　　 Seeing Muleng said it was difficult, it should be very difficult! She can only look up to her elementary school scum.
　　 "Fortunately, I didn't waste time in vain." Su Xiaoxiao praised his wit.
　　 Others say that I am melon, but I don’t know me at all!
　　 Su Xiaoxiao put his cheeks in his hands, and said with bright eyes, "Hey, Mu Leng, do you think Cheng Nuo knows this question?"
　　 "Well, he..." Mu Leng remembered the many surprises Cheng Nuo had given him recently, and smiled softly, "He should be able to."
　　…………
　　 On the podium, Comrade Old Tang was sitting with his eyes squinted.
　　 holding the thermos in one hand, blowing the heat lightly with his mouth.
　　 What is in the thermos cup is not tea, but Chinese medicine that nourishes the stomach, such as wolfberry and angelica.
　　 Old Tang took a sip and couldn't help chanting a little poem in his heart.
　　People have no choice but to soak wolfberries in a vacuum flask.
　　 Chinese wolfberry is hard to stop the years, add some angelica in the cup.
　　 Angelica is hard to stop with the Years Knife, ginseng antler with small roast.
Although 　　 Xiaoyao is good, pilose antler is expensive, but leek kidneys are more affordable.
　　 Although leeks and kidneys are affordable, Huiyuan Shenbao has to be fed.
　　 Huiyuan Shenbao is not tasteful enough, but bullwhip and deer whip can reach the stomach.
　　 The bullwhip and the deer whip are a bit crazy, and I have to eat Huang Shanghuang.
　　 ahem, it’s far away, a bit far away...
　　 Old Tang put the thermos cup on the table, opened his squinted eyes, and looked at the people under the podium.
　　 The classmates are actually burying their heads in calculations. Some people have written three or four sheets of paper.
　　 Muleng also had a little thought.
　　 Since each row, the sum of each column is equal to a fixed number. That fixed number is easier to calculate. Add up all the 25 numbers from 1 to 25 and divide by 5, which is the fixed number-65!
　　 Then...
　　 Then Muleng got stuck! There was no progress for five or six minutes.
　　 A very tragic ending.
　　 On the podium, Old Tang looked around with satisfaction for a week.
　　 Suddenly, when he glanced at a corner, his face became a little unnatural.
　　 Because he clearly saw that Cheng Nuo, who was sitting in the corner, was...remembering words!
　　 Old Tang remembered telling Cheng Nuo that he could review other subjects after finishing the tasks assigned by him in the math class.
　　 Could it be... Cheng Nuo has already worked out this problem?
impossible! If you don't know that rule, there is no reason to think of the correct answer in such a short time!
　　 Old Tang was puzzled.
　　 Old Tang stood up and clapped his hands, attracting everyone's attention.
　　 "Did you make it?" Old Tang asked with a smile. "If you make it, you can try it out."
　　 Most of them are shaking their heads.
　　 Old Tang gradually turned his eyes on Cheng Nuo.
　　 Cheng Nuo, who was memorizing words in a low voice, suddenly felt the chrysanthemum tighten, and when he looked up, he saw Old Tang's smiling face.
　　 "Cheng Nuo, have you come up with the answer to this question?" Old Tang said with a smile.
"Well, if any other classmates do it, let him give him this precious opportunity. A set of math test papers doesn't make any sense to me. Because I am in high school mathematics, there is no room for improvement." Cheng Nuo shook his head, and spoke with a sigh.
　　 Classmates + Old Tang: "……"
　　 This is... the pretense really convinced us!
　　 Give you 1024 likes~EbookFREE.me~ plus a website!
　　 Old Comrade Tang coughed unnaturally. After a few seconds, he returned to his normal expression and spoke to the class, "Except for Cheng Nuo, do you have any knowledge of this question?"
　　 At this moment, the whole class actually wanted to talk about it. It hit Cheng Nuo's face hard once.
　　 But what...
　　 I can't keep up!
　　The scalp that I was thinking about was almost exploding, but still...I didn't think of any feasible solution to the problem.
　　 They all feel now, are their heads and Cheng Nuo's heads of the same brand?
　　 Why can Cheng Nuo's brain be so smart and wise...
　　 And my own brain is not as useful as Noko!
　　 Seeing that no one responded, it was within Old Tang's expectation. This question is normal if no one has done it within ten minutes.
　　 As for Cheng Nuo...
　　 Well, this guy is not included in the sequence of normal people.
　　 "Since no one has raised their hands, come up and do this question." Old Tang said helplessly.
　　 "OK!"
　　 Cheng Nuo smiled lightly and got up from his seat.
　　 stepped onto the podium with an incomparably pulling wind.
　　 If there is another BGM at this time, it will be even better!
　　 "How invincible is, how lonely ~ how invincible is, how empty ~ independent in the cold wind, let the cold wind blow by~"
How about 　　, does this BGM feel great!
　　 Old Tang made a please gesture to Cheng Nuo.
　　 Cheng Nuo picked up a piece of chalk with a faint smile on his mouth.
　　 "Isn't it the Rubik's Cube matrix? Simple!"
　　……………………
　　 Call friends and call friends for recommendation! ! Jianghu help! !