After learning that making an airship requires some light and tough materials, Lydia immediately suggested using camel leather that has been soaked in water and dried to make the airbag of the airship. This material meets the requirements very well and is usually used in the sails of large warships.
On the foggy sea, the sails of the warship they sailed were made of camel leather. No matter how big the storm was, it could not destroy it. It was very durable and reliable.
The frame of the airship airbag can be made of the branches of the magic tung tree, which has high tensile, compressive and bending strength...
Lydia talked incessantly. In the field of aircraft design, she was far inferior to Lin En, but she knew the characteristics of various materials in the other world very well.
Lin En silently calculated in his mind that if the airship was made according to the materials Lydia mentioned, the performance of the airship would definitely be improved a lot, but the cost would also become extremely high.
At least one hundred magic gold coins are needed...
Lin En thought about his savings and coughed twice, interrupting the girl's words. "Actually, this airship is just an experimental version. It doesn't use such good materials. A nearly good one will do!"
"How is that possible? This is the first airship that can fly and turn in the sky." Lydia said with longing.
“I can only give you twelve magic gold coins as a deposit.” Lin En said helplessly, and took out a purse. This was one of the few assets he had. The rest of the money would have to be filled when there were more students in the Olympiad Mathematics class, and then he could apply for some teaching funds from Hellram...
Lydia shook her head and refused to accept it. The new knowledge that Lin En explained to her was worth more than a hundred magic gold coins. Moreover, this airship was directly related to whether she could enter the Yieta Magic Academy.
"The money for making the airship can be considered as tuition for the lecture. I will use the best materials to build it. Let's start now!" Lydia wiped the stains off her face and asked Darren to call the rest of the halflings in the workshop. She wanted to complete the construction of the airship within a month.
Looking at the halflings who were busy working, Lin En wanted to help, but was stopped.
The use of magic might leave traces, and it would be bad if Master Hellram thought that the airship was suspected of being built with magic. Besides, Lin En was a customer, and it made no sense to let a customer do it himself.
In view of this, Lin En, who had nothing to do, could only take charge of the command and watch those halflings, who were only half his height, running around carrying wood that was heavier than themselves.
…
The progress of airship production was faster than Lin En had imagined. After working all night, one-sixth of the overall frame had been built. If it weren't for the large amount of camel leather used to make the airbags that required special processing, which took a lot of time, it would probably take less than a month to build the airship.
However, such rapid progress was not without cost. The halflings were almost exhausted, as all their previous enthusiasm had been put into their work.
Darren was lying on a solid wooden board and snoring. Lydia was even more exaggerated. She slept directly on the frame of the airship, holding a beam tightly, with saliva at the corners of her mouth, and she muttered something from time to time.
Lin En shook his head and immediately stopped several halflings who were still busy. He moved Lydia and others who had fallen asleep into the house and let them have a good rest.
After becoming a wizard apprentice, not sleeping for a night did not have any effect on Lin En's spirit, so after settling Lydia, who fell asleep due to exhaustion, he left the workshop directly.
After a whole day, Lin En was looking forward to seeing whether the wizard apprentices could solve the exponential formula he left behind.
Pushing the door and walking into the classroom, Lin En saw all the confiscated coins piled up on the desk. What surprised Lin En was that the classroom, which seemed a little empty in the last class, was now packed.
A quick glance showed that there were at least 150 to 160 people. If the classroom wasn't big enough, I'm afraid they wouldn't be able to accommodate all of them.
Is an index game so useful? "Good morning, everyone!" Lin En's mind was full of thoughts, but he didn't show any of them on the surface.
However, the students' reactions were more enthusiastic than he had imagined.
"Professor Lin En, are there any other Olympiad math problems?"
…
Looking at the extremely excited wizard apprentices in the classroom, Lin En was completely shocked. Could it be that all the students at Yieta Magic Academy were a bunch of masochists?
I'm so passionate about math...
No, something must have happened that I didn't know about.
Lin En thought about this, but he was not in a hurry to confirm it. Instead, he turned to look at Alok and asked. "It's been a day now. I believe you should have the answer, right? Alok?"
"Professor, the sum of these thirty-six squares is six hundred and eighty-seven billion nineteen million four hundred and seventy-six thousand seven hundred and thirty-five..." Alok stood up hurriedly and answered tremblingly.
He had confirmed this number many times, counting twenty pages, but the final amount was too large and he only had one chance to answer. If he got a number wrong, he would be doomed.
Under Alok's anxious gaze, Lynn nodded.
"Very good, that's correct."
"Have you figured out the meaning of the formula I gave you?" Lynn asked again.
"I have figured it out. The sum of the numbers in the squares is equal to twice the last digit minus one!" Alok said confidently. After he no longer had billions of debts, his lost confidence was restored.
In order to get the correct result yesterday, he calculated for a whole night, and it was through repeated confirmation that he discovered this trick.
Lin En nodded again. With little mathematical knowledge, it was considered a barely acceptable achievement to be able to find this pattern in one day.
"Professor Lin, can I get the bonus?" Alok asked expectantly.
Pierce and the others looked at Alok with envy. That was twenty magic gold coins. Although they had calculated for a long time yesterday, they were not as desperate as the other party and could not find the pattern first.
Lin En naturally knew that Hellram had offered a reward for the formula he wrote, but due to his professor's reserve, he was reluctant to take it himself.
But it's still a long way to go to get the money just by finding the rules! "Alok, my summation formula is not that simple. What if I slightly modify the rules of the grid game, for example, the number in the next square must be three times the number in the previous square? Will your theory still apply?" Lin En asked with a smile.
The smug expression on Alok's face froze instantly. He immediately started to do some calculations in his mind, and then picked up the quill to write and draw on the papyrus...
"What if we add another rule that you need to place seventeen copper coins in the first grid?" Lin En asked again.
Alok completely collapsed, his mind was filled with a huge amount of numbers...
This is too difficult!
He couldn't figure it out at all! (PS: I ask for everything for the new book.) Thanks to book friend Surt Twilight Sword for the 5,000 starting coins, Infinite Fantasy Township for the 500 starting coins, Pterosaur Brother for the 200 starting coins, and book friends 20220702132423100 and 20220214153251180 for the 100 starting coins.
(End of this chapter)