Xiao Yan opened his mouth and turned out to be puzzled, as if he didn't know what the secret treasure of the battle was after they had been fighting for a long time.

"Oh~?they've never entered the secret treasure space!"

Sure enough, as soon as Xiao Yan's question was raised, someone immediately shouted out loudly.

"yes...... They are only in the third grade of cultivation, I think back then, when I was in the third grade, I was still on the battlefield of Zhaozhou Bridge, and the battlefield of Zhaozhou Bridge didn't seem to have any secret treasures, no wonder they didn't know. Then, immediately, someone suddenly said it.

"Oh~?Brother Xiao Yan, we have been fighting for so long, you don't know what the secret treasure is?" Duan Tiansheng also suddenly understood, no wonder Xiao Ming and the others looked dazed and didn't say anything. It turned out that he didn't know what the secret treasure was.

"Uh...... Yes, Senior Brother Duan, what is the secret treasure?" Xiao Ming was slightly stunned when he heard Xiao Yan's words. Strange in his mind, it seemed that Xiao Yan took Ruolan into some secret treasure space three days ago, but now Xiao Yan actually said that he didn't know, although Xiao Ming didn't know what kind of medicine Xiao Yan bought in the gourd, he still subconsciously united with Xiao Yan.

"Yes, Senior Brother Duan, what is a secret treasure?" Ruolan was a careful girl, and when she saw Xiao Ming and Xiao Yan say this, she naturally pretended to be very confused. In fact, she was also quite at a loss in her heart, what would the secret treasure that Duan Tiansheng was going to open in a while look like.

"Huh...... Look at me, negligent. In this way, I can't explain this thing clearly for a while, now I'm just asking you, would you like to follow Senior Brother Duan to find the secret treasure, and when you encounter the secret treasure, I believe that what you see will be clearer than what I said, safety issues, there are so many senior brothers and sisters, you don't have to worry. After Duan Tiansheng laughed, he patted his forehead, and then tried to find the words to describe the secret treasure in his mind, but he thought about it for a while, the secret treasure seemed to be difficult to describe in words, so he simply changed the word.

"Yes!"

Hearing Duan Tiansheng say this, Xiao Ming, Ruolan, and Xiao Yan nodded violently almost at the same time.

"Huh...... Okay, now, everyone agrees, let's unseal it first!" Duan Tiansheng smiled slightly after seeing the three of them nodding, then turned around, waved his big hand, and led everyone to the boulder on the other side of the platform. In the center of the boulder, a relatively large geometric mixture figure represents that this is the seal to enter the secret treasure space, and if you want to enter the secret treasure space, everyone must first unlock this seal.

Xiao Ming and the others are naturally in the center of everyone and are well protected by everyone. Although Nangong Hong was injured, it did not affect her movements now, but in order to take care of the wounded, Nangong Hong also walked in the center of everyone.

Now, facing Nangong Hong head-on, Xiao Ming didn't know what to say, so he had to give Nangong Hong a rather embarrassing smile. But then he was ignored by Nangong Hong. And Ruolan began to talk to Nangong Hong cordially, and the content of the conversation was naturally extremely admirable to Nangong Hong.

"Xiao Yan's reflexes just now are good, if you say that you have entered the secret treasure space, you may be noticed by someone with a heart. And Xiao Ming, naturally, there is Chen Lao to chat to relieve boredom.

"Oh, that's it, it seems that Xiao Yan is still more excited. After listening to Chen Lao's analysis, Xiao Ming couldn't help but look at Xiao Yan next to him, but then, he was snorted coldly by Xiao Yan. Of the three people he knew, only Ruolan was good to Xiao Ming. The other two, hostile to unknown.

"Of course, his brain is much more exciting than yours!" Old Chen couldn't help but praise Xiao Yan.

"Uh......"

Xiao Ming was naturally speechless.

Moreover, at this time, everyone also happened to walk in front of the pattern.

Xiao Ming saw that the stone wall in front of them was hundreds of meters high, and some places were covered with moss and vines. In the center of the stone wall, a circular pattern appeared in the center of the stone wall, and then on the top of the pattern, there seemed to be a lot of uncleaned moss, and on the ground there were many mosses and vines, and the messy appearance seemed to have been torn off by people.

Xiao Ming immediately guessed that this pattern must have been covered by moss and vines before, and I don't know who found it and cleaned up these mosses and vines, so the circular pattern appeared.

"This seal, it's not simple......" Xiao Ming looked at the seal on the wall, and instantly felt a little dizzy. Although the general outline of the pattern is a circle, there is a parallelogram inside the circle, and the diagonal line of this parallelogram is exactly across the center of the circle.

This kind of pattern, Xiao Ming felt dizzy when he saw it, and in an instant he guessed that it must be an extremely unsimple seal, otherwise how could he get dizzy just by looking at it.

"Where is it not simple? I think it's very simple, it's nothing more than the right angle to the side is exactly the diameter, you only need to measure a radius to solve the area of the circle, the area of the quadrilateral, the circumference and so on. When Chen Lao heard Xiao Ming's words, he couldn't help but pout.

"Of course, Xiao Ming, according to your current cultivation, naturally it can't be solved, hehehe......" Chen Lao slapped Xiao Ming, and didn't forget to smile heartily.

"This figure, Nangong girl, are you coming or am I coming?" Duan Tiansheng observed for about two minutes, then turned his head and saw that most of the people looked at the figure with a look of hard thought and meditation, and then suddenly saw Nangong's red eyes lit up, and he seemed to have a solution, and couldn't help but say.

"Hehe, let's come here, I won't be ugly. Nangong Hong smiled slightly and refused.

"Is there an answer to this?" The conversation between Duan Tiansheng and Nangong Hong immediately aroused other exclamations. They are also strong in the fifth and sixth grades, and naturally they have mastered the decoding of graphics. But they had a little bit of an idea, but they didn't expect that Duan Tiansheng and Nangong Hong had a solution, and they had to admire.

"Okay, don't waste time, I'll come!" Duan Tiansheng was not polite, and the next moment, he directly sacrificed a pencil and a ruler. Yes, a pencil. However, this pencil is not his combat weapon, but his measuring tool.

"Go!" Duan Tiansheng also didn't hold a pencil ruler in his hand, as soon as the pencil ruler came out, it automatically stopped on the top of Duan Tiansheng's head, and then almost didn't see any movement from Duan Tiansheng, with a soft scream, the ruler and the pencil flew towards the pattern very obediently.

Just this hands-free manipulation ability can be seen to be much stronger than the average sixth-grade powerhouse.

Then, Xiao Ming saw that under the automatic cooperation of the ruler and the pencil, two lines were quickly drawn on the circle, and then, Xiao Ming saw that Duan Tiansheng drew another line through the intersection of the two lines that crossed in the circle.

"Old Chen, what are you doing?" Although the method is simple, Xiao Ming can't understand it at all.

"Hehe, this is looking for the center of the circle, the point where the two straight lines intersect inside the circle is the center of the circle. Chen Lao immediately explained.

"Uh...... I don't understand ......" Xiao Ming naturally shook his head, the circle is basically only able to be understood in the fifth grade, and Xiao Ming naturally can't now.

"Hehe, two hundred!" Duan Tiansheng smiled, and the next moment, he took out an eraser again, carefully erased the three lines he had just drawn, and then withdrew all his tools.

"Two hundred?" Nangong Hong muttered, and at the same time, there was thought in his eyes. Two hundred is exactly the diameter that Duan Tian measured just now. Except for Nangong Hong, the others also sank into thought for a moment.

"Yes, Senior Sister Nangong, let's compare, who will calculate the area of this figure first?" Duan Tiansheng turned his head and looked at Nangong Hong.

"Okay!" Nangong Hong nodded, and his eyes lit up again. Although she was seriously injured now, her competitive spirit was not extinguished, and a piece of paper and a pen appeared in front of her in an instant.

"Hehe......" Duan Tiansheng saw Nangong Hong take out the scratch paper, smiled slightly, and his movements were not slow, only one second slower than Nangong Hong.

Although some others were not invited by Duan Tiansheng, they couldn't help but take out paper and pencils when they heard this number.

"What is the relationship between Senior Brother Duan and Nangong Hong?" Xiao Ming saw such a scene, and he didn't know why, and he seemed a little uncomfortable in his heart.

"Huh...... The area of the parallelogram is 40,000, the circumference of the circle is 628, and the area is 62,008. Chen Lao couldn't help but chuckle when he saw that Duan Tiansheng and Nangong Hong actually sent out the scratch paper because of such a simple calculation, and then said the answer.

"Forty thousand, six hundred and twenty-eight, sixty-two thousand, eight?" Xiao Ming couldn't help but whisper. However, at this time, she happened to be heard by Nangong Hong, she just calculated that the area of the parallelogram was forty thousand, and at this time, she couldn't help but pause abruptly, and then glanced at Xiao Ming suspiciously.

"This, Old Chen, are you accurate?Why are you so fast?" Xiao Ming was glanced at by Nangong Hong, and felt that Nangong Hong's glance was very meaningful, and he couldn't help but hurriedly confirm it with Old Chen.

"Huh...... Believe it or not!"

Chen Lao didn't pay attention to Xiao Ming, but just gave Xiao Ming a roll of his eyes.

"Six hundred and twenty-eight, a coincidence, or ?" And at this moment, Nangong Hong just calculated the circumference of the circle, and when she saw this number, Nangong Hong couldn't help but stop her pen again and glanced at Xiao Ming.

"No, Old Chen, are you really right!?" Nangong Hong's two eyes finally made Xiao Ming see something.

"Haha, Senior Sister Nangong, I don't know if it's finished, your Senior Brother Duan is not talented, just finish it first!"

It just happened that at this time, Duan Tiansheng actually laughed out loud.

"No, Senior Brother Duan is really powerful!" Nangong Hong immediately stopped writing, and then involuntarily glanced at Xiao Ming. Duan was born to be fast, so Xiao Ming's answer in an instant was the speed of sound?

"Hehe, it's nothing, I don't know where Senior Sister Nangong is?"

"I have calculated that the circumference of the circle is six hundred and twenty-eight, and that the area of the quadrilateral is forty thousand, and the area of the circle has not yet been calculated...... I don't know what Senior Brother Duan is?"

"Mine is the same as you, except that I calculated the area of the circle, which is exactly sixty-two thousand eight!" Duan Tiansheng raised his scratch paper, and suddenly, Xiao Ming saw that in this short period of time, there were no less than hundreds of calculations listed on Duan Tiansheng's scratch paper. Xiao Ming couldn't understand any of the equations.

"Sixty-two thousand eight?" At this moment, Nangong Hong finally looked at Xiao Ming in surprise. Xiao Ming didn't use scratch paper and pencils, but came up with the answer in just a moment. This...... This kind of amazing coincidence, once it may be Meng, twice it is luck, but the third time, Nangong Hong was finally a little surprised.