I don't know how many things are counted, and the famous mathematical problems in ancient times in the past life are not expected to be seen here.

Xie Tianji looked at Yang Xuan lightly, his eyes were full of contempt.

Yang Xuan smiled and said directly: "Twenty-three." ”

The smile on Xie Tianji's face froze, he looked at Yang Xuan very incredulously, with a hint of surprise in his eyes, however, this surprise was also fleeting, he opened his mouth, and just wanted to say something, but Yang Xuan directly interrupted him.

"One hundred and twenty-eight. ”

The expression on Xie Tianji's face froze again, and what he was about to say was also held back into his throat.

Yang Xuan didn't give him a breather, and continued: "Two hundred and thirty-three, three hundred and thirty-eight......"

Xie Tianji froze, and after a while, he looked at Yang Xuan incredulously and asked, "There are still two hundred and thirty-three, and three hundred and thirty-eight." ”

Yang Xuan smiled and said, "There are four hundred and forty-three, and there are many more." ”

Xie Tianji didn't speak, he suddenly squatted down, and quickly calculated on the ground, and after a while, he got up and looked at Yang Xuan in a daze, and asked in a daze: "How did you calculate so fast?"

Yang Xuan smiled secretly in his heart, the problem of not knowing the number of things was a classic in the previous life, how could he not know, now it is just a matter of reading from the book.

Ling Wudao saw Xie Tianji's shocked look, and knew the result in his heart, and couldn't help laughing: "Old Xie, Mr. Ren is quite accomplished in mathematics, and now you believe it." ”

Xie Tianji still looked at Yang Xuan in disbelief and did not answer Ling Wudao's words.

After a while, he suddenly said, "I want this person." ”

After that, he directly grabbed Yang Xuan's arm and pulled it away.

Yang Xuan struggled slightly, his eyes had already looked at Xie Tianji, and then, he glanced at Meng Qingqing again.

Xie Tianji was stunned for a moment, then understood what he meant, and said anxiously: "Let's go, let's go together."

When Ling Wudao shook his head slightly and smiled bitterly, Xie Tianji had already pulled Yang Xuan and Meng Qingqing away without a trace.

Ling Wudao was the only one left in the hall, and after he pondered for a while, he said lightly: "Bury Venerable Hao's body thickly, and care for his family with double standards, this matter will be over, and no one will mention it again." ”

Someone outside the door gently agreed, turned and left.

A smile slowly crept up on Wudao's face, meaning inexplicable.

After being pulled by Xie Tianji and passing through countless strange buildings, they entered a huge cave.

After passing through several heavily guarded gates, the scene that appeared in front of Yang Xuan's eyes directly shocked him.

In front of him, there was a huge space, on the ground, made of bluestone, and on the huge table were countless bottles and jars, about half of which were carved from crystal.

Yang Xuan could hardly believe his eyes.

Where is this cave, this is a huge laboratory at all.

On the table, there should be test tubes carved from crystal as a whole, and one by one flasks, all of which showed Yang Xuanzhao a scientific atmosphere.

At this time, Yang Xuan's heart was shocked, and he couldn't imagine that this Xie Tianji not only had research on mathematics, but also on chemistry, and looked at the other tools placed on the side, maybe he also made achievements in physics.

This is the ancient scientist!

Xie Tianji looked at Yang Xuan proudly, and the hillbilly expression on Yang Xuan's face that looked like Grandma Liu entering the Grand View Garden made him feel very comfortable.

"Brother Ren, although you are inferior to me in mathematics, you are not bad, and you can propose the method of shadow measurement, and the old man is also impressed. Xie Tianji looked at Yang Xuan triumphantly: "But the things in this stone cave, I guess you can't understand it." ”

He has changed his tune and called Yang Xuan Ren's younger brother, which can be regarded as a recognition of his attainments in mathematics.

Xie Tianji walked over, picked up a test tube, and sighed: "Don't talk about you, it is estimated that in this world, no one will know what the old man is doing, the old man is lonely." ”

Saying that, he made an invincible look of loneliness, very stinky fart.

Meng Qingqing couldn't help but look around, in this huge stone cave, there were more than a dozen Biyun Sect disciples wearing uniform uniforms, and they didn't know what they were busy with.

Yang Xuan approached the stone table and picked up a crystal bottle with a label on it, painted with symbols that Yang Xuan didn't recognize, and there was white powder in the bottle, I don't know what it was.

"Don't move, you can't afford to break it. A middle-aged man walked over and looked at Yang Xuan with an unswerving expression.

Yang Xuan smiled, put down the crystal bottle again, and didn't speak.

Chemistry?

Sorry, he happens to be a chemistry major.

If he takes out a little bit of the chemical knowledge in his brain, it is light to beat Xie Tianji, and it is estimated that in this world, he will not be able to find such a share.

At this time, he had an idea in his heart, the Biyun Sect is famous for its use of poison, could it be that the poisons of the Biyun Sect come from here?

Then he shook his head again, denying what he had thought.

The poison of the Biyun Sect has long been poisoned into the Dao, and its effect is not at all achievable by chemicals.

Obviously, Xie Tianji's purpose in bringing him here was not to study chemistry, but to do mathematics.

Xie Tian turned around and took out a piece of paper, spread it on the empty stone table on the side, and beckoned to Yang Xuan: "Brother Ren, come and see this, what do you think?"

Yang Xuan walked over when he heard this, his eyes swept over the paper, and he was a little stunned.

What is drawn on this paper is a three-dimensional figure, shaped like a flask, with a ball underneath, and on top of the ball, a cylindrical object stands.

Seeing this thing, Yang Xuan's heart suddenly moved.

Measurement knows the length, and the side circumference is straight?

If the things on this graph are infinitely magnified to the point where it is impossible for a human force to measure a specific value, then the two methods he described can be used.

Yang Xuan keenly felt that he seemed to have come into contact with some secret.

Xie Tianji looked at Yang Xuan and observed his expression.

Yang Xuan asked directly: "Old Xie, what is this?"

Xie Tianji hesitated for a moment, and did not answer Yang Xuan directly, but asked: "If this object, well, this thing is so huge that human power can't measure its height, can you use the shadow measurement method you said to know its height?"

Yang Xuan looked at him and said tentatively: "A martial artist can fly, can't he measure his height?"

Xie Tianji shook his head and said: "That place can't be ......" Before he finished speaking, he seemed to realize that he had leaked his mouth, and said to him: "In short, manpower cannot be measured. ”

Yang Xuan's heart moved, and he thought for a while: "If there is a constant light source that can make this object produce a shadow, you can get a specific height." ”

Xie Tianji muttered: "How to calculate it specifically, can the elder brother explain one or two?"

Yang Xuan looked at him speechlessly, didn't you still look down on people just now?

However, he had already realized that this Xie Tianji had a respected status in the Biyun Sect, and he might still be above Ling Wudao, with his words, would he and Meng Qingqing be safe and sound?

Thinking of this, he didn't go around the corner, and directly said to Xie Tianji: "Old Xie, I can't hide it, at this moment, both of us are prisoners under the stairs......

Before he finished speaking, Xie Tianji had already waved his hand and said, "No matter what you do, I will keep you both safe, you can rest assured." ”

This was domineering, but Yang Xuan still said: "Old Xie doesn't know, there is already a Venerable in your sect who has been killed by me..."

Xie Tianji said impatiently: "As long as you don't kill a few people with their names on them, it doesn't matter if everyone else is on them." ”

Domineering!

Yang Xuan secretly gave him a thumbs up.

Meng Qingqing also looked at Xie Tianji with interest.

Yang Xuan was relieved, if he had Xie Tianji, presumably no one in the Biyun Sect would embarrass him.

At this moment, Ling Wudao suddenly walked in, he looked at Meng Qingqing and said, "Let's go, that old man Meng of your family has sent an elder with me to replace you." ”

Yang Xuan was stunned for a moment, didn't he change his mind? Why did he change his mind again?

。 m.