Chen Qixian and the three of them followed the instructions of the voice and came to the bottom of a hillside, and there was a house on the hillside. The voice came out again: "Isn't it, the strength of you guys is so low? You don't even have a foundation building period, interesting, interesting, with such a low strength, you can come here, and you are safe and sound, which really makes the old man admire." ”

Chen Qixian and his party didn't answer him, and walked directly to the hillside, and along the way, they also saw some corpses wearing battle armor placed. These bones are older than those of the Skeleton Corps. Chen Qixian looked at these bones, he was a little sad, but it was impossible for him to bury all the bones here, because on the way here, they saw more bones that were not buried well, if he buried them all, the purpose of this trip would be meaningless. They're just looking for the Heart-Nourishing Grass.

When I came to the door, I saw four big characters carved out of the top of the door: Array of Hidden Books. There is a stone statue of a divine beast similar to a unicorn standing on the left and right, and this threshold is a bit high, Chen Qixian pushed the door in, the room is very small, as soon as you enter, you can see a table, and there is an offering table behind the table, on which there are several spirit cards. The books on the table were all open, but there was no font at all. On the left, there is a kitchen, and on the right, there is a room. Huaiying and Mo Liang have both sides to see, not to mention people, there is not a single mosquito.

"It's strange, the voice is indeed coming from here, why is there no one. Huaiying slung the MSI Sword on his shoulder and looked around.

Indeed, except for some simple buildings, there was really not a single figure to be seen, Chen Qixian looked towards the wall. There are dozens of stones on the walls on both sides. "Hey, you say, is there any principle here that is possible with the same principle as Uncle Li's cave?" Chen Qixian cocked his hands and studied the dozens of stones on the wall.

"It's not a way to just look at it, I'll try it first. Huai Ying handed the MSI Sword in his hand to Chen Qixian, and jumped up with one kick, touching the stones in different orders. Huaiying returned to the ground, and the surroundings were quiet and nothing changed.

"I'll come. As soon as Cumin wanted to jump against the wall, he was pulled back by Chen Qixian with one hand.

"What did you come to, you're all hurt, and you come here? Chen Qixian pointed to the threshold and said.

Cumin walked to the threshold angrily and sat down fiercely, Chen Qixian did not jump up, but carried the magic tricks, and several magic tricks hit it. Huai Ying's eyes widened, he didn't expect that there was such a method, much faster than jumping up and jumping down just now. However, there was still no movement in the whole house. Mo Liang didn't admit defeat either, a cloud of mist condensed into several chess pieces, and hit it. However, nothing has changed.

It's not a way to try like this, there are more stones on the wall than in Uncle Li's cave, if it's really the same principle, then if you try it like this, you will definitely waste a lot of time. There will definitely be some hints here, and there must be something that you haven't discovered yet. Chen Qixian slowly retreated, walked to the threshold and looked inside, there were stones on the walls on both sides, and the position of the stones was very arbitrary, huh, wait, Chen Qixian suddenly found that the position of the table and the position of the spirit card were not in the center. The table is slightly to the left, and the spirit cards are slightly to the right.

The number of books on the table is five, and the number of spirit cards is also five. If this is the case, then the scope will be narrowed down a lot, and I saw Chen Qixian say: "Mo Liang, go and look at the position of the stones on the left wall, are there five of them that are the same as the position of the books on the table." ”

Mo Liang compared it seriously, hey, there really is. Chen Qixian smiled, it seemed that his guess might be right, and he shouted again: "Mo Liang, if you look at the position of the stones on the wall on the right, are there five of them that are the same as the position of the spirit card?"

Mo Liang also compared it and nodded: "It's really there." "Chen Qixian walked in, very good, now their range can be determined, now just get the order of connection out. Based on his knowledge of mathematics for more than ten years, he can be sure that he will calculate the order of several combinations in a very fast time.

"First of all, let's give each of the five stones a serial number, and now we're going to calculate it. 12345, 12354, 12435, 12......" and so on, it seems like a lot. And this range, I still don't feel like it's been reduced much.

"Isn't it very simple?" Cumin sat on the threshold and said: "First of all, 1 is in the first place, 2 is in the second place, then there are 6 permutations, followed by 3, 4, and 5 in the second place, and there are 6 permutations each, so the arrangement of 1 in the first place can be multiplied by 4 by 6, there are 24 kinds of permutations, followed by 2 in the first place, 1 in the second place, and so on, then there are 24 permutations, 1 to 5, each in the first place, then it is 24 times 5, a total of 120 sequences." That's it.,It's very simple.。 ”

The three of them looked at her with a blank expression, Mo Liang asked Huai Ying and Chen Qixian in a low voice: "You two know what she is talking about?" Huai Ying and Chen Qixian shook their heads: "It's not very clear." ”

Cumin patted his forehead: "So to tell you, directly 5 times 4 times 3 times 2 times 1, and the final result is equal to 120." Got it?"

The three of them still shook their heads, and the other two didn't understand, but Chen Qixian couldn't say anything if he didn't understand, cumin pointed at Chen Qixian and said, "Don't tell me, you even forgot the math of high school?"

"I'm a liberal arts student, how can I do a science student's question?" Chen Qixian waved his hand.

"This is a question for science students? There are also liberal arts majors, okay. Cumin continued to pat her forehead, feeling that if she continued to ask like this, she would be angry with Chen Qixian.

But this still doesn't work.,120 orders on the left.,120 orders on the right.,Add up to 240.,The range is also a bit large.。 But either way, try it. Maybe if you're lucky, you'll be able to do it in 10 times.

"Let's rest for a while, no, the aura is exhausted. The three of them sat on the ground sweating profusely, but fortunately the wind kept blowing in from outside the door. Chen Qixian watched Cumin sitting on the threshold, holding his chin with his left hand, looking outside, hey, just when Cumin pulled her short hair behind her ears, Chen Qixian found a detail, the wind is not very strong, but it can blow cumin's hair up, why the books on the table have no reaction at all, not to mention that those books are open, there must be a cat.

He ran to cumin quickly, pulled cumin and slowly walked to the table: "Stand, just stand here and don't move." ”

"What are you doing?" but she still stood there. I saw that the wind had blown cumin's short hair into chaos.

"Well, that's fine, let's go back and get some rest. Sure enough, Chen Qixian's guess was not wrong, and sure enough, there must be something strange in the book. Chen Qixian picked up a book, flipped a few pages casually, and after a few breaths, it automatically turned back to the original page, so now it began to find the next pattern.

Chen Qixian turned over the five books at the same time, watching the speed of the five books turn back to the original number of pages, one is slower than the other, if according to the current position, two books are on top, two books are below, one book is in the middle position, the top two are 1 and 2, the middle one is 3, and the next two books are 4 and 5. Then there are two kinds of order, one is 51342, and the other is 24315 in reverse.

"I seem to know the right order. Chen Qixian said his thoughts, and everyone didn't object, anyway, there is no way now, and there is no harm in trying. I saw Chen Qixian move the trick with both hands, and first try the first order, 51342. The magic trick touched the last stone, and immediately after, the stone statue of the divine beast on the left in front of the door emitted a light, shining on the five stones.

"Great, it worked, but if your reasoning is correct, what are you going to do with this wall on the right? Huai Ying asked the question.

"According to the rules of our world, the left and right sides should be symmetrical. Or try the 24315 order. Cumin explained. It was too late to say that it was too late, Chen Qixian once again carried the magic trick and typed the order, and the stone statue of the divine beast on the right in front of the door gradually shone brightly, and then refracted to the five stones on the right wall.

I saw a circle of light appear next to cumin, and cumin jumped up in fright. "Okay, now I don't know if this aperture can only go in one person at a time. Huaiying, you first talk to Mo Liang to see if you can go in, and I'll go in with cumin later. Chen Qixian said.

"Good. Huai Ying turned around and walked into the aperture with Mo Liang.

After a while, seeing that neither of them came out and the aperture was still there, Chen Qixian looked at Cumin and asked, "How is it, can you go by yourself now?"

Cumin nodded: "Yes, but it still hurts a little, and it may have to go slowly." ”

"Let's go. Chen Qixian still held on to cumin and walked into the aperture.

The space inside is larger than the cave space that Uncle Li found, it is simply a small world, and Huaiying and Mo Liang are waiting in front.

When Chen Qixian came to Huaiying and Mo Liang's side, the stone cave behind him gradually became clear. However, there is a recessed round platform between them and the cave. There is a spiritual monument in the middle of the cave, and if you want to walk through, you have to cross through the stone pillars that protrude in the middle. It's still a bit similar to the Jingtan chessboard.

"Oh, you're here? Great, great, it's been a long time since anyone came to play with me. The voice came from the monument. Chen Qixian felt speechless, whether it was the Jingtan chessboard or here, how could he play with this kind of empty nester.

Chen Qixian turned his head and noticed cumin's expression at this time, cumin's expression was a little puzzled and a little absent-minded. "What's wrong, cumin?" asked Chen Qixian.

"Hmm? This place, I've been here, and the first place I woke up was here. Cumin recalls that when she woke up, the first place she was was here. "Oh, I remember, you told me to inherit something. Cumin looked suddenly enlightened, stared at her big eyes, pointed to the spirit tablet and said loudly.

"Hey, little girl, it turned out to be you" The voice of the spirit tablet came again: "Then I still want to ask you, do you want to inherit my array ghost spirit tablet?"

"Cut, I don't want to be grinning. You bad old man, very bad. Listening to cumin's tone, it seems that he is quite familiar with this bad old man. It seems that cumin really didn't lie.

"Since we know each other, then it's easy to talk, so this old-timer, why don't you tell us where the heart-raising grass is, and when we finish the matter, how about talking about life with the seniors?" Mo Liang and Chen Qixian were both stunned, seeing Huai Ying talk to someone in this tone for the first time.

"Oh, you young man is quite pleasant to speak, but whether you know each other or not, I still want you to play with me. Come on, the young man who just said that I was too much, and now I have another task for you, and if you can rest these two, then I will say that you are amazing. As soon as the spirit tablet finished speaking, the two coffins fell at the same time, the coffin door opened automatically, and the two pairs of white bones stood up.

"Come on, let me wait and see!" the voice of the spirit monument resounded throughout the space.