"Attention, you'd better not take tricks with a question that has no answer or you don't know the answer. If the question you ask cannot be answered by yourself, it means that you have lost, which means that you are not eligible for Ravenck. Law’s confession. If I didn’t answer your question within five minutes, it means I lost. Then I confess your wisdom on behalf of Ravenclaw."

The Eagle Knocker finished its rules, and then announced: "You can now ask questions."

Lynn didn't immediately try to ask questions, but stood still and thought calmly.

The Eagle Door Knocker was created by Ravenclaw. Its wisdom in producing riddles is equivalent to reaching the extreme, and its ability to solve puzzles is the same as the ability to produce riddles.

But this so-called extreme can only represent the extreme of Ravenclaw alone, which means that the puzzle-solving level of the eagle door knocker is similar to that of Ravenclaw himself.

Moreover, this door knocker does not always stand on its laurels. The things and theories that it understands only stayed a thousand years ago. Obviously it has some channels to understand the changes of the outside world. Otherwise, it is impossible that it has not been asked the same question for nearly a thousand years. .

Although Lynn was a teacher in his previous life, he is just a new language teacher. He has no interest in riddles and other problems. He doesn’t know much about some problems on the Internet. He wants to ask a question that the eagle door knocker can’t guess. It is not a simple matter.

The rules of the door knocker even blocked the opportunity for him to ask some unsolved mysteries of the world (in fact, even if you can ask him, he still doesn’t remember what the various unsolvable problems are, unless it is professional, otherwise who is idle and fine. Will remember this?).

He thought for a long time, but the eagle door knocker didn't urge him, and finally Lynn decided to ask a question he had seen on the Internet to try the water.

"If 1=5, 2=15, 3=215, 4=2145, then 5=how much?"

Knocker Hawk didn't hesitate when he heard Lynn's question, it said without hesitation.

"5=1."

The first question is over. The Knocker Eagle did not enter Lynn's trap, but he was not frustrated. After all, it was just a matter of opportunism to test the waters, and Lynn did not have much hope.

"You have two more chances." Knocker Eagle said coolly. It is not a ruthless riddle machine. It is obvious that Ravenclaw also gave it emotions when creating it, allowing it to experience pride and pride. Satisfy such emotions.

Lynn frowned and thought carefully.

This door knocker also thinks like a person, but it is sensible enough to avoid much of the fog attached to the surface of the riddles, that is to say, those riddles similar to brain teasers are not difficult for it at all. .

But the way of thinking is good, but it also has big flaws.

Lynn pondered for a long time, he suddenly thought of a question, but before asking this question, he still needs to confirm one thing with the knocker.

"Your brain was given to you by Ravenclaw. Is it a human brain, not a machine, just like ordinary people?"

"If you want me to answer, it will also use up a question."

Lynn didn't care about it. If he was sure of this matter and the problem couldn't stop the eagle knocker, then he would be completely gone, and whether there was a chance would be the same for him.

"Can."

"Of course, my mind is exactly the same as a human being. It's just like the wise man among humans. My master, Rowena Ravenclaw, is smarter than a normal person. As for a machine? How can a machine have a brain? That is a dead thing."

Knocker Eagle said proudly, as if proud that he could have the same wisdom as his master.

Lynn felt confident in his heart immediately, since the Knocker Eagle's calculation method was still human brain, then he was sure to win this time.

With a smile on his face, he gave the knocker a math problem

"Use the ten numbers 0, 1, 2, 3, 4, 5, 6, 7, 8, and 9 to form a five-digit number. What is the total number of five-digit numbers containing three odd numbers and two even numbers? Piece?"

This is the only high school math problem that Lynn remembers, because he was ill for a while and missed class. He missed a few sections of the permutation and combination solutions and formulas taught by the math teacher, which caused the results of the monthly exam to be changed from the whole class. The first position fell off, so he later made up a bit of knowledge and wrote this typical example on the first page of the wrong book. As long as you turn it over, you can see it at first glance. , So I will not forget it until now.

The eagle knocker was silent.

The first time it heard this question, it wanted to try one by one. How many counts would it have to try out. However, before it came and started desperately discovering, with so many possibilities, he would definitely not be able to do so within five minutes. Solve the problem!

Even if the door knocker eagle can keep up with the times and advance with the times, it is limited to the magic world, and no one in the magic world has learned the mathematical problem of permutation and combination.

Even the Muggle-born little wizards said that they had completely said goodbye to ordinary society after the age of 11, and they never had the opportunity to touch this part of the mathematical content.

It thought silently for another three minutes, but it still didn't find any confusing information in the title. It seemed that besides listing the possibilities one by one, it didn't get an answer at all.

"You fouled!"

Knocker Eagle said with certainty, "There is an answer to this question, but no one can say the answer within five minutes, even five hours!"

Lynn looked at the Knocker Eagle with a smile, he knew he had won.

"I can calculate the answer for you now. There are 11,040 types of numbers that meet the conditions."

The Knocker Eagle fell silent again, and for a while it couldn't judge whether the answer Lynn gave was right or wrong.

"How did you get the result? Numbered in advance?"

"Who would be idle and nothing to count this? This is a mathematical problem~lightnovelpub.net~As long as you learn the formulas and methods, you can easily get the result by putting the numbers in."

Lynn looked at the Knocker Eagle who was very confused about what he said, knowing that it hadn't received a modern education and couldn't understand what he said.

"Then you can't be sure that the answer I said is correct? Who will win?"

Knocker Eagle struggled for a long time, and finally it said: "I have a way to tell if you are right or wrong, but it will take time."

Lynn was shocked when he heard it: "Aren't you planning to use your brain to calculate all the numbers and count them one by one, right?"

"To verify that your answer is correct, of course you have to do this."

"But how long will it take you?"

Knocker Eagle estimated it, hesitatingly said: "It should take about five days."

"How do you make sure that the numbers listed will not repeat with your mind?"

"I have my own way."

Seeing that this is the eagle's brains, just want to personally verify whether the number Lynn said is correct, this he has a feeling of shooting himself in the foot.

"There is no other way?" He asked unwillingly.

But this stupid eagle just admits death: "I have to verify your answer by myself, otherwise I won't recognize you."

"It's up to you."

Lynn is gone, but only for five days. It is September 14th, and after five days it will be the 19th.

That day was the first time he went to Dumbledore. There were still three days before the time node returned to normal, and he had been waiting for these five days.

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