Chapter 103 (1/2)
”Today, let's do an interesting math problem!”
As he spoke, old Tang drew a 5 * 5 grid on the blackboard.
Lao Tang pointed to the Gong Ge on the blackboard and said, ”the requirements of the title are like this. In this 5 * 5 gonggeli, fill in 1 ~ 25, a total of 25 numbers. Make the sum of his five numbers equal in every row, column and diagonal line
”Do you understand the title? It's only when the sum of 12 groups of numbers in each row, column, diagonal line are equal to complete the problem. ” Old Tang continued with a smile. ”It's a question that sends out thoughts. It doesn't need to be a complicated problem-solving step. You can try it. The first to do, will have the priority to get the mathematical simulation volume I just out of the right! And my own free reading opportunity
The corner of the mouth of the crowd.
Teacher, you reward some Fresh and refined!
Although they did not dare to be interested in the reward proposed by Lao Tang, it did not stop them from seeking knowledge about this topic.
25 consecutive numbers, fill in a 5 * 5 square.
According to the possibility, there are 1.5511210043331 × 10 ^ 25 possibilities.
If one tries, it is definitely a lifetime series.
Therefore, we must find a new way. Think with divergent thinking.
Simple problem-solving methods must exist, it depends on whether they can think of it.
Mu Leng frowned and looked at the 5 * 5 palace grid on the sketch paper. There's no clue in my head.
”What is the law?” Muran's whisper.
Su Xiaoxiao, sitting on the side, did not hold the solution to this problem. He blinked his big watery eyes and looked at Mu Leng.
”Mulen, do you have any ideas?” Su Xiaoxiao looks forward to it.
Mu Leng smiles bitterly and shakes his head, ”the head is a mess, there is no clue at all.”
”Well? Is the problem so difficult? ” Su xiaoxiaoqingyi, as a primary school slag, all the questions are difficult, so there is no feeling.
See Mu Leng said it was very difficult, that should be very difficult! She can only look up to her.
”Fortunately, I didn't waste my time.” Su Xiaoxiao praised her wit.
Others say I am melon, in fact, I am not melon at all!
Su Xiaoxiao held her cheek in her small hand, and her eyes were shining and said, ”ah, Mu Leng, do you think Cheng Nuo can solve this problem?”
”He...” Mu Leng thought of Cheng Nuo's surprise to himself recently, and gave him a light smile, ”he should be able to do it.”
…………
On the platform, old Comrade Tang sat squinting.
Holding a thermos cup in one hand, blowing hot air gently through the mouth.
And the thermos cup is not tea, but wolfberry, angelica and other nourishing stomach Chinese medicine.
Old Tang Mei Zizi's drink, heart can't help reciting a poem.
Middle aged people have to, soaking wolfberry in the heat preservation cup.
Chinese wolfberry is hard to resist the urge of time, add some Angelica in the cup.
Danggui is hard to resist the knife of time. Ginseng and pilose antler are served with small roast.
Although small cooking is good, velvet antler is expensive, leek and kidney flower are more affordable.
Although Chinese chives and kidney flowers are affordable, Huiyuan Shenbao still has to be fed.
Huiyuan kidney treasure is not enough flavor, bullwhip and deer whip can reach the stomach.
The bullwhip and the deer whip are a little crazy, and they have to eat the splendid.
Cough, it's far away. It's a little far away
Old Tang put the thermos cup on the table, opened his squinting eyes and looked at the people under the platform.
The students are actually buried in the calculation. Some people have already filled three or four sheets of paper.
Muran's side, also had a little thought.
Since the sum of each row and column is equal to a fixed number. This fixed number is easier to calculate. A total of 25 numbers from 1 to 25 are added up and divided by 5, which is the fixed number - 65!
And then