Just as Lynn thought, the extremely high requirements did not deter Lydia, but made this halfling girl high-spirited and took the design very seriously.

Knowing that airships would require something light and tough, Lydia immediately suggested that airship airbags could be made from water-soaked and dried camel leather, which was a very suitable material and would be used on the sails of large warships.

In the misty sea, the sails of the battleship they sailed were made of camel leather, which could not be destroyed by even the greatest storm, and was very durable and reliable.

The frame of the airship airbag can be made of the branches of the magic tree, and the tensile strength, compressive strength and bending strength are very high......

Lydia gushed that she was far inferior to Lynn in the field of aircraft design, but she was clear about the characteristics of various materials in the other world.

Lynn silently calculated in her mind that if it was made according to the materials Lydia said, the performance of the airship would definitely improve a lot, but the same cost would also become extremely high.

A minimum of 100 Magic Coins is required......

Lynn thought about her little deposit, and couldn't help but cough lightly twice, interrupting the girl's words. "Actually, this airship is just an experimental version, and it doesn't use such good materials, it's almost fine!"

"How can that work? It was the first airship to be able to fly through the sky and turn. Lydia said wistfully.

"I can only give you twelve magic gold coins as a deposit." Lynn said a little helplessly, and took out a money bag, which was one of the few possessions he had, and the rest of the money could only be filled by waiting for more students in the Olympiad math class and then applying for some teaching funds from Hurram......

Lydia shook her head and didn't take it, just the novel knowledge that Lynn explained to her was worth more than a hundred magic gold coins, not to mention that this airship was also directly related to whether she could enter the Iyeta School of Magic.

"These deposits will be used as tuition fees for the lecture just now, and I will use the best materials to make it, and I will start working from now on!" Lydia wiped the stains from her face and told Darren to call the rest of the workshop to make the airship within a month.

Looking at the busy group of halflings, Lynn had the intention of helping, but was stopped.

The use of magic may leave traces, and it would not be good if Master Hellam thought that this airship was suspected of being made by magic, and Lynn was a patron, and there was no reason to let patrons do it themselves.

With nothing to do, Lynn had nothing to do but take charge of the command, watching the halflings, who were only half as tall as herself, running around carrying logs heavier than herself.

……

The progress of the airship production was a little faster than Lynn expected, and after a busy night's work, the overall frame had been built one-sixth, and if it weren't for the special treatment of a large number of camel beast leather used to make airbags, it would take a lot of time, and I am afraid that it would not even take a month to build the airship.

However, such a fast progress is not without a price, and the halfling people are almost tired, and they have been full of enthusiasm to work.

Darren was lying on a sturdy plank and snoring, and Lydia was even more exaggerated, sleeping directly on the frame of the airship, clinging to a beam, with saliva still on the corner of her mouth, muttering something from time to time.

Lynn shook her head, and when she stopped a few halflings who were still ready to work, moved Lydia and the others who had slept into the house, and told them all to rest.

After becoming a wizard's apprentice, not sleeping for a night had no effect on Lynn's spirit, so after settling Lydia, who had fallen asleep due to exhaustion, he left the workshop directly.

After a full day, Lynn was a little curious to see if the wizarding apprentices had figured out the exponential formula he had left behind.

Pushing the door open and entering the classroom, a lot of the confiscated coins were piled up on the lectern, and to Lynn's surprise, the classroom, which had seemed a little empty in the previous class, was now packed.

A cursory sweep of the room showed that there were as many as one hundred and fifty or sixty people, and if it weren't for the fact that this classroom was large enough, I am afraid that it would not be able to squeeze in.

Is an exponential game so useful?

"Good morning, everyone!" Lynn's mind was full of thoughts, but on the surface it didn't show anything.

However, the students' response was more enthusiastic than he expected.

"Professor Lynn, are there any other math Olympiad problems?"

"I've already counted the numbers for thirty-six squares and forty-nine squares......"

……

Looking at the extremely excited wizard apprentices in the classroom, Lynn was completely shocked, could it be that the students of the Iyeta Academy of Magic are a group of shaking M?

I have such a high enthusiasm for doing math problems......

No, there must have been something going on that I didn't know about.

Thinking like this, Lynn didn't rush to confirm, but turned to look at Elok and asked. "It's been a day now, and I'm sure you already have the answer, right? Elok? ”

"Professor, the sum of these thirty-six squares is six hundred eighty seven thousand one hundred seventy nine thousand seven hundred and thirty-five,......" Elok replied as he hurriedly stood up, trembling.

He had confirmed this number many times, counting twenty manuscripts, but in the end the amount was too large, and he only had one chance to answer, and if he got one number wrong, it would be over.

Under Ellock's apprehensive gaze, Lynn nodded.

"Very good, correct answer."

"Have you figured out the meaning of the formula I've given you?" Lynn asked again.

"I've figured out that the sum of the squares is equal to twice the last digit minus one!" Elok said confidently that after losing tens of billions of debts, his lost confidence had regained.

Yesterday, in order to get the correct result, he calculated for a night, and it was through repeated confirmation that he discovered this trick.

Lynn nodded again, without much mathematical foundation, in one day, it was barely qualified to find this rule.

"Professor Lynn, can I get the bonus?" Alok asked, expectantly.

Peirce and the others all looked at Elok with envy, it was a full twenty magic gold coins, although they had been counting for a long time yesterday, they were not as desperate as the other party, and they couldn't find this pattern first.

Lynn naturally knew that Hellam had set a bounty for the formula he had written, but because of the professor's reserve, he couldn't take it himself.

But it's too far to get this money based on the pattern you find!

"Ellock, my summation formula isn't that simple. You say, what if I changed the rules of the checkered game a little, such as the number of the next square must be three times the number of the previous square? Is your theory still universal? Lynn asked with a smile.

The smug expression on Elok's face froze for a moment, and he immediately counted in the center of his mind, and then picked up a quill and wrote and drew on the papyrus......

"What if you put seventeen copper coins in the first slot?" Lynn asked again.

Elok was completely devastated, his mind already filled with countless numbers......

It's so hard!

He can't figure it out at all!

(PS: I want everything for the new book.) ）