As the beautiful lady spoke, she came to Zhang Hong's side again and looked at Zhang Hong's breath.

"Hehe, let me introduce you, this is Brother Zhang Hong. Xue Yan smiled at Mei Jiaoniang, looked at Zhang Hong again and said, "Brother Zhang Hong, this is my senior sister Mu Tang." ”

"Not to mention the strength of cultivation, as long as he eats or not, sits or sits, I don't think he is a good bird. As Mei Jiaoniang spoke, she also sat down.

"This Mu Tang girl, she speaks a little mean!" Zhang Hong looked at the beautiful girl Mu Tang and said.

"I like to tell the truth, my brother is a busy man, he can't spend his time on messy things, and he shouldn't make friends who aren't worth making. Mu Tang said.

Hearing this, Zhang Hong shrugged his shoulders and was a little speechless.

Zhang Hong didn't expect this beautiful girl named Mu Tang to look so beautiful and moving, but she spoke so mean and realistic.

Mu Tang's words were undoubtedly telling Zhang Hong that if Zhang Hong didn't have any skills, he wouldn't be worthy of being friends with Xue Yan.

Zhang Hong is right to think about it, he has just stepped into the Mortal Martial Ninefold, and his strength is much worse than Xue Yan in the Heavenly Martial Realm.

Faced with Mu Tang's words, Zhang Hong really didn't know how to reply to Mu Tang.

As Mu Tang said, his cultivation strength is really not worthy of being friends with Xue Yan.

At this time, Xue Yan looked at Mu Tang and said, "Senior Sister Mu Tang, what are you talking nonsense?"

"Senior Brother Xue Yan, you are not an ordinary person, what do I usually tell you, now is a critical period, you should be cautious when making friends, many people who are close to you may be the ones who want to harm you. Mu Tang said.

"Senior Sister Mu Tang, it's not that exaggerated. Brother Zhang Hong is a genius. Xue Yan smiled at Mu Tang and said.

"Wizard, I think he's a genius at eating!" Mu Tang said with a bit of sarcasm.

Just now, Zhang Hong had a big meal, but he ate a lot of things, and now he still has some hiccups.

Faced with Mu Tang's words, Zhang Hong really didn't know what to say.

"Senior Sister Mu Tang doesn't know, Zhang Hong is an arithmetic wizard!" Xue Yan said.

"Arithmetic wizard?" Mu Tang looked at Zhang Hong, shook his head, and said, "He will be an arithmetic wizard?"

"Senior sister, what I said is true. Xue Yan said.

At this time, Xue Yan moved his hand and released his magic weapon, the Burning Lamp Ancient Tower.

The ancient tower of burning lamps floated above Xue Yan's head, and in an instant, layers of lamps were gradually ignited by Xue Yan's thoughts.

Soon, the ancient tower of lights was spinning.

Mu Tang saw that the Burning Lamp Ancient Tower was opened by Xue Yan, and there was a hint of surprise in his eyes.

"Senior Brother Xue Yan, you actually activated the Burning Lamp Ancient Tower?" Mu Tang was shocked for a while.

"That's right, for a long time, the Ancient Burning Lamp Tower could not be opened, and now, the Ancient Burning Lamp Tower has finally opened. Xue Yan smiled at Mu Tang.

"It's unbelievable. As Mu Tang spoke, he looked at Zhang Hong on the side again, and asked, "The Burning Lamp Ancient Tower needs to solve an arithmetic problem to open, Senior Brother Xue Yan, you won't say that it was the arithmetic problem he helped solve!"

"That's right. Xue Yan said.

"The arithmetic problem of opening the Burning Lamp Ancient Tower is extremely difficult, even our master took half a year to solve it back then, this guy is only a mortal martial arts realm cultivator, how can he solve it?" Mu Tang said.

"As I said, Brother Zhang Hong is an arithmetic wizard. Xue Yan said.

"I don't believe it!" Mu Tang frowned.

"Senior Sister Mu Tang, when the master left, he left us a few magic tools and array diagrams, these magic tools and array diagrams need to solve the arithmetic problem before they can be opened, and now, my Burning Lamp Ancient Tower has solved the arithmetic problem, which can be opened, and the Qingying Ancient Whip in Senior Sister's hand should also be able to be opened. Xue Yan said.

"All along, what I learned was the whip method, this Qingying ancient whip is the magic weapon left to me by the master, how can I not unlock the seal of the arithmetic problem, so I can't start it, this Zhang Hong..... Childe can really help me solve the arithmetic problem that sealed the Blue Immortal Ancient Whip. Mu Tang thought for a while and said.

"Brother Zhang Hong is an arithmetic wizard, of course he can help Senior Sister unlock the seal of the Qingying Ancient Whip. If the two of us' treasures can't function, how can we avenge our master. Xue Yan said.

"Are you an arithmetic wizard?" Mu Tang looked at Zhang Hong again and asked.

"I'm not an arithmetic wizard, I just know a little. However, Miss Mu Tang's words just now were too mean, and I didn't like it very much. Zhang Hong shook his head and said.

"Brother Zhang Hong, my senior sister is such a person, don't be surprised. Xue Yan thought for a while, and then said: "By the way, this lion building was opened by my senior sister, if Brother Zhang Hong can help my senior sister solve the puzzle, and then eat meat and drink wine here, I can give you free." ”

"Really?" Zhang Hong smiled and looked at Mu Tang.

"Of course, the premise is that you can solve the arithmetic problem of my ancient whip. Mu Tang said.

"Listen to the arithmetic problem. Zhang Hong said.

When Zhang Hong said this, Mu Tang immediately took out one of her magic weapons.

This magic weapon is Mu Tang's Qingming Ancient Whip.

Like the Burning Lamp Tower, the Immortal Ancient Whip needs to solve an arithmetic problem to open.

At that moment, Mu Tang put the whip on the table.

Zhang Hong took a look, only to see that this whip was extremely long, heavy on the head and light on the tail, at least nine feet.

"No! it's this whip. Mu Tang said.

"Back then, when our master left, he left several magic tools for the two of us, each of which needed to solve an arithmetic problem before it could be opened. Xue Yan shrugged and said.

"The arithmetic problem is engraved on the whip. Mu Tang said.

Zhang Hong took a look at the whip, on this whip, there is really an arithmetic problem: "There is a nine-foot Qingming ancient whip today, the weight of the head and tail is decreasing step by foot, beheading one foot, three catties and four taels, cutting off the tail one foot, one catty and eight taels, try to ask how much each foot of Qingming weighs?"

Zhang Hong saw this arithmetic problem, it was a review question, the meaning of this question is: this whip is a total of nine feet, the head of the whip weighs three catties and four taels, and the tail of the whip weighs one foot and weighs one catty and eight taels.

Zhang Hong frowned, and soon understood the meaning of this question, and couldn't help but think to himself: The arithmetic problem of the Burning Lamp Ancient Tower is the arithmetic problem of the equal proportion number series, but I didn't expect that the arithmetic problem on this Qingying Ancient Whip is actually an arithmetic problem of the equal difference number series.

"How's it going? Brother Zhang Hong. Xue Yan asked curiously.

"I'll try! This arithmetic problem shouldn't be too difficult. Zhang Hong said.

"That's good!" Xue Yan said.

As soon as Zhang Hong and Xue Yan said this, Mu Tang immediately showed a strange expression.

Zhang Hong looked at this arithmetic problem, and had already started mental arithmetic: this is a typical problem of equal difference number series, according to the equal difference number series, first find the tolerance d = (3.4-1.8) / (9-1) = 0.2, so that you can find the weight of each foot, in order of three catties and four taels, three catties and two taels, three catties, two catties and eight taels, two catties and six taels, two catties and four taels, two catties and two taels, two catties and eight taels.

Zhang Hong shrugged his shoulders and thought: This problem is a simple series of equal differences, and it is not too difficult!

Zhang Hong smiled and said: "It has been calculated, the weight of each foot of this Qingming Ancient Whip is three catties and four taels, three catties and two taels, three catties, two catties and eight taels, two catties and six taels, two catties and four taels, two catties and two taels, two catties and two catties, and one catty and eight taels."

As soon as Zhang Hong said this, Xue Yan and Mu Tang glanced at each other, and they both showed surprised expressions.

"Is this out?" Xue Yan asked.

"Nothing, it's just a simple series of equal differences. Zhang Hong said.

"Equal difference number question?" Xue Yan frowned.

"That's right. Zhang Hong said.

"Since Zhang Hong has given the answer, senior sister, you can try it!" Xue Yan said.

"Hmm!" Mu Tang nodded.

This Qing Ming Ancient Whip has a characteristic, only by perceiving the weight of each foot of the Qing Ming Ancient Whip can the Qing Ming Ancient Whip be activated, otherwise, it is impossible to use the Qing Ming Ancient Whip to exert its power.

When Mu Tang heard this, his mind moved, and he even perceived the Qingying Ancient Whip.

Soon, the Qing Ming Ancient Whip was flooded with a cold aura, and in an instant, the Qing Ying Ancient Whip moved, like a long snake dancing, rushing straight forward.

"Boom!"

A wall in front of it was blasted open by the sound of this explosion.

This explosion also caused a lot of commotion in the restaurant.

"Hehe, sure enough, sure enough!"

Mu Tang suddenly became excited, she never thought that the Qingying Ancient Whip would be activated like this, and send out such a strong divine might.

"Qing Minggu can really move. Mu Tang said.

"I'll just say, Zhang Hong is an arithmetic wizard!" Xue Yan said.

"Since I got the Green Soul Ancient Whip, I haven't been able to run the Green Soul Ancient Whip, but I didn't expect that after unlocking the answer, it would be started so easily. Mu Tang said.

As Mu Tang spoke, he waved the Qingying Ancient Whip again, and it was difficult to hide his excitement.