"Today, let's do an interesting math problem!"

While speaking, Old Tang drew a 5*5 grid on the blackboard.

Old Tang pointed to the palace grid on the blackboard and said, "The requirements of the question are like this, in this 5*5 palace grid, fill in a total of 25 numbers from 1~25." Make the sum of the five numbers equal to each of his rows, every column, and every diagonal!"

"Do you understand the question? It is the sum of each row, each column, each diagonal, a total of twelve groups of numbers that are equal to the sum of this problem. Old Tang continued with a smile. "It's a thought-provoking problem that doesn't require complicated steps to solve, so everyone can try it. The first ones to do it will have the right to get the math simulation paper I just came out first! There will also be a free review opportunity for me!"

The corners of everyone's mouths twitched.

Teacher, your reward is a bit ...... It's fresh and refined!

Although they were not interested in the reward proposed by Old Tang, it did not stop them from being curious about this topic.

25 consecutive numbers in a 5*5 square.

In terms of possibilities, there are 1.5511210043331 × 10^25 possibilities.

If you try it one by one, it's definitely a lifetime series.

So, be sure to find a different path. Think about problems with divergent thinking.

A simple solution must exist, it's up to them to think of it.

Mu Leng frowned lightly, looking at the 5*5 palace grid drawn on the scratch paper in a daze. I don't have a clue in my head.

"What is the rule?" Mu Leng murmured softly.

And Su Xiaoxiao, who was sitting on the side, didn't have a way to solve this problem at all, and looked at Mu Leng with a pair of big watery eyes.

"Mu Leng, do you have an idea?" Su Xiaoxiao looked forward to it.

Mu Leng smiled bitterly and shook his head, "My head is a mess, and I don't have any clue at all." ”

"Hmm, is this question so difficult?" Su Xiaoxiao sighed, as a scumbag in elementary school, all the questions are one difficulty, so she doesn't feel anything.

Seeing that Mu Leng said that it was difficult, it should be very difficult!

"Thankfully, I didn't waste my time in vain. Su Xiaoxiao praised her wit.

Others say that I am a melon, but in fact, I am not a melon at all!

Su Xiaoxiao put her hands on her cheeks, and said with sparkling eyes, "Hey, Mu Leng, you say, will Cheng Nuo do this question?"

"What ...... he" Mu Leng remembered the surprise Cheng Nuo had given him recently, and smiled lightly, "He should be able to." ”

............

On the podium, Comrade Tang sat with his eyes squinted.

Holding a thermos cup in one hand, he blows the hot air lightly with his mouth.

What is placed in the thermos cup is not tea, but wolfberry, angelica and other traditional Chinese medicine that nourishes and nourishes the stomach.

Old Tang took a sip and couldn't help chanting a small poem in his heart.

When people reach middle age, they have to soak wolfberries in a thermos cup.

The wolfberry is hard to resist the urging of the years, and add some angelica to the cup.

Angelica is difficult to stop the knife of the years, ginseng and deer antler velvet with small burning.

Although the small roast is good, the antler velvet is expensive, and the leek kidney flower is more affordable.

Although the leek kidney flower is affordable, Huiyuan Kidney Treasure still has to be fed.

Huiyuan Kidney Treasure is not tasteful enough, and the bullwhip and deer whip can reach the stomach.

The bullwhip and deer whip are a bit crazy, and you have to eat Huangshanghuang.

Ahem, it's far, it's a little far......

Old Tang put the thermos cup on the table, opened his squinted eyes, and looked at the people under the podium.

The students are honestly burying their heads in calculations. Some people have already filled three or four pieces of paper.

Mu Leng's side also had a little thought.

Since the sum of each row and column is equal to a fixed number. Then this fixed number is easier to calculate. A total of 25 numbers from 1~25 add up, and then divide by 5, which is this fixed number - 65!

And then......

Then Mu Leng was stuck! Stuck for five or six minutes without any progress.

A very tragic ending.

On the podium, Old Tang looked around with satisfaction.

Suddenly, when his gaze caught a glimpse of a corner, his face became a little unnatural.

Because he clearly saw that Cheng Nuo, who was sitting in the corner, was actually ...... Memorize words!

Old Tang remembered that he told Cheng Nuo that in the mathematics class, after completing the tasks assigned by himself, he could review other subjects.

Don't...... Cheng Nuo has already calculated this problem?

If you don't know that rule, there is no reason to think of the right answer in such a short time!

Old Tang was puzzled.

Old Tang stood up and clapped his hands to attract everyone's attention.

"Have you made it?" asked Old Tang with a smile. "If you make it, you can come up and try it. ”

Most of them were shaken head answers.

Old Tang gradually set his eyes on Cheng Nuo.

Cheng Nuo, who was reciting words in a whisper, suddenly felt the chrysanthemum tighten, and when he looked up, he saw Old Tang's smiling face.

"Cheng Nuo, have you figured out the answer to this question?" said Old Tang with a smile.

"Hmm~, if other students make it, give him this precious opportunity. A set of math papers, which doesn't make any sense to me. Because I was in high school math, there was no room for improvement. Cheng Nuo shook his head and spoke in a sighing tone.

The whole class + Don: "......"

This is ...... The pretending is really impressive!

1024 likes for you, plus a website!

Comrade Tang coughed unnaturally and slowly, and only after a few seconds did he return to his normal demeanor and speak to the class, "Except for Cheng Nuo, do you know this question?"

At this point, the class was really eager to say yes. hit Cheng Nuo's face hard.

But what can I do......

I can't keep up with my IQ!

My scalp is about to explode, but it's still ...... Didn't come up with any workable solution.

They all feel that their heads are not the same brand as Cheng Nuo's heads!

Why can Cheng Nuo's brain be so smart and wise......

And his own brain, it's not as good as Naiko!

Seeing that no one responded, it was also expected by Old Tang. It's normal for no one to do this question within ten minutes.

As for Cheng Nuo......

Well, this guy is not included in the sequence of normal people.

"Since no one raised their hand, then you can come up and do this question. Old Tang said helplessly.

“OK！”

Cheng Nuo smiled faintly and got up from his seat.

Walk up to the podium with an incomparably windy gait.

If there is another BGM at this time, it will be even better!

"How invincible is, how lonely ~ Invincible is how, how empty ~ Independent in the cold wind, let the cold wind blow ~"

How about it, does this BGM feel very compatible!

Old Tang made a gesture of please 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?

........................

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