"Xiao Ming. ”

Wen Xiaocheng's words made Fu Chenyi's smile freeze on his face. It's not that he didn't expect Xiao Cheng to be able to solve the problem, but he didn't expect that as soon as his question was finished, the other party gave the correct answer as soon as the voice fell......! That's outrageous, isn't it?

The other students in the classroom didn't know if the answer was correct, but looking at Fu Chenyi's expression at this moment, they all understood.

"You...... How did you figure it out?"

Xiao Cheng shrugged his shoulders, "Who told you I solved it?"

"Huh?"

There was another uproar in the audience.

"I'm blinded!"

knew that Xiaocheng was talking nonsense, but everyone present felt that there was a mouthful of old blood in their chests about to spurt out.

"A multiple-choice question, even if it won't, there is a one-quarter probability of being right, you will give me a total of three options, the probability is as high as one-third, is it not easy to be blind?"

Fu Chenyi wanted to kill him very much.

But that's not all.

"Given your IQ and the way I answered, I'll tell you the truth, I had a 100% chance of getting it right – just like I got a perfect score in the math Olympiad. ”

Fu Chenyi's face was already purple and speechless, but the students below were very curious, this is a very practical test-taking skill, if you can improve the chance of getting the test right if you can't do the question, it is also very helpful to get a high score in the corresponding test.

"Brother Cheng, tell me, how did you get it?" someone accosted below.

"Okay, I'll show you who asked me the question again—like him. ”

The classmates below are really cooperative, and a boy in the front row has a really good memory, recalling: "Xiao Ming, Xiao Hong and Xiao Qiang are ......"

"No, just the question part. ”

"Well, who's the referee in the third game?"

"Little Red...... Jack bauer...... Xiao Ming ...... "When Wen Xiaocheng said these three names this time, he deliberately made it funny, "How old is Xiao Ming and Xiaohong, isn't it too naïve?"

"Everyone!" At this time, Wen Xiaocheng walked down from his seat, walked in front of Fu Chenyi, pointed to the face of this unlucky man, as if using Fu Chenyi's face as a teaching prop, and introduced it to everyone: "That sentence just now seems to be my contempt for the naivety of the topic, but pay attention! When I mentioned the three names in front of me, his expression was different!"

At this time, Yang Liushan in the back row had completely understood, her cheeks were red, she pursed her lips and couldn't help laughing, while the other classmates were still confused.

"I'll be the first to say Xiaohong, his expression will be like this!" Xiao Cheng made a slightly smug expression with the corners of his mouth raised, "Obviously this answer is wrong!"

"If, when I say the second name, he still has this expression, then the correct answer must be the third! It's also a coincidence, the first one I just said was Xiao Ming—and then he had a look of being struck by light—then I don't know I'm right?"

Yang Liushan's face is red, this girl has suffered in the sorghum field - oh, not in the sorghum field, it is KFC.

"Xiaoqiang!" Wen Xiaocheng had an arrogant expression of pouting and disdain;

"Xiao Ming!" immediately changed to a shocked and bewildered expression, no different from Fu Chenyi just now;

"Little Red!" was the previous disdain again......

After a few funny times, the whole class laughed, and several people were so happy that they were angry, and even Yang Liushan, who has always been a lady, was so happy that she shed tears.

"Xiao Cheng!" At this time, Teacher Zhan was about to clean up the situation, so he called Xiao Cheng.

"Attention! Xiaocheng is not right, so ......" Wen Xiaocheng and the classmates in the classroom gave Teacher Zhan a "wrong answer" expression, Zhan Tianyi finally held back his laughter, and couldn't help it anymore, snorted, the tea in his mouth just now spurted out, and now everyone couldn't help it, the class laughed and was full of joy.

"Wen Xiaocheng! I admit that you are very clever and can use your sense of humor to distract everyone! But you didn't solve this problem at all, so I'm still not convinced!"

The last sentence of disbelief was shouted by Fu Chenyi with red eyes, how presumptuous everyone laughed at the moment, how much it hurt him.

"Okay, Brother Cheng is a specialist in all kinds of dissatisfaction!" Saying that, Xiao Cheng walked up to the podium and asked Teacher Zhan to sit down, and then occupied the blackboard and explained to everyone: "What I said just now is joking with everyone, in fact, this is a logical reasoning problem, and it is not very difficult, so I will share the solution ideas with you, and talk about the conventional method first!"

In order to prevent everyone from laughing again, Xiao Cheng replaced the names of Xiao Ming and Xiaohong with A, B and C, and introduced to everyone: "There are only three, the rule is to work in twos and twos, and three batches are not allowed, so look at this condition: C has been the referee of five games, what does it mean?"

The children at the bottom were not stupid, and someone immediately replied: "It means that A and B have played five games." ”

"Very good! A has played a total of 15 rounds, and he has played five games with B, so he ...... with C."

Needless to say, 15-5=10 is a simple question.

In the same way, B played 21 rounds, then B and C played 21-5 and 16 rounds.

How many rounds are there?Simple addition, 10 + 5 + 16 = 31 rounds.

"Note, the only thinking obstacle in this question is here, there is no tie in table tennis, so assuming that the first game A is the referee, the second game A must be on the field, that is to say, a person can not be a referee twice in a row, it must be separated by others, as long as you understand this problem, it will be easy to do, a total of 31 games were played, of which 16 games were played between B and C, A is the referee, how to separate?"

At this time, most people have already understood that A has been a referee more than half of the total number of games, so it must be that he is a referee every other game, and it is an odd-numbered game - this kid stinks the ball, and he has never won!

Therefore, the answer is already very obvious, the referee in the third game must be A, that is, Xiao Ming.

Below, Fu Chenyi's face was already as earthy.

But that's not all.

"It's the usual way to solve the problem, but there are even easier ways to solve it. ”

The students here, even if they were forced by their parents, are more or less talented in mathematics, and they are very interested in simple algorithms, and even Fu Chenyi, who came up with the question, also had his eyes lit up.

He came up with this problem, and he had never heard of an easy solution.

"When we look at the paper, I think most people have a judgment in their heads. Xiao Cheng said, and wrote the question that Fu Chenyi said verbally just now on the blackboard word for word.

"Three known conditions with numbers, one implicit condition about the rules, everyone only reads the question, does not look at the question, can you guess what the questioner will ask?"

Of course, this can't be guessed, because there are a lot of questions that can be asked, but all of you here are top-level players, and you can basically calculate how many games A, B and C have played through these conditions, or how many times they have been referees, but they are not as fast as Xiaocheng.

In fact, the reason why Xiaocheng can see through the answer at a glance, when he is reading the question and has not looked at the question, he will guess what will be asked according to the difficulty of the test paper and the teacher's thinking, if it is an exam in school, then this question can only be a simple calculation, such as who has been the referee how many times and so on, but in the Olympiad competition, it will not be so simple.

"Yes, if you ask how many games one of the three has played, or how many games in total, it's not difficult, right? But he's asking who the referee is in the third game?"

This time, everyone fell into thinking, and it seemed that they had never considered solving the problem from the perspective of solving the problem before.

——————

On the first day of the Lunar New Year, I am catching up with Chapter 166, so those who give me tips these days for the New Year, and those who send me exclusive red envelopes, everything will go well this year!