After being abandoned by my biological mother, my stepmother took me home

"Sister Yanyan, is that classroom far away?" Xu Lele couldn't help but ask after walking for a long time before arriving.

"That classroom is in the back hill." Gu Lingyan looked back at Xu Lele and said.

"I see, no wonder we haven't seen different classes." Xu Lele suddenly realized.

"Will they also participate in tomorrow's event?" Jin Ling asked.

"They should disdain to participate in such rogue activities." Gu Lingyan said with disdain.

"Then what do they usually play?" Jin Ling asked curiously.

"They are only interested in things that interest them, and don't care what the people around them think." Gu Lingyan led them into the back mountain.

"Sister, is Brother Xiaotian really here?" Xiao Mengmeng looked at Gu Lingyan nervously and asked.

"It should be." Gu Lingyan said uncertainly.

"It's okay, Mengmeng. Let's go and take a look and we'll find out." Xu Lele comforted Xiao Mengmeng.

"Hmm, Crab, you are Lele!" Xiao Mengmeng pursed her lips and smiled at Xu Lele.

"We're here. You guys wait here and I'll open the door." Gu Lingyan let go of Xiao Mengmeng's hand and looked at the questions that appeared on the door screen. She thought about how to solve the questions.

"What is this?" Xu Lele stepped forward curiously and looked at a screen on the door, which displayed a question she didn't understand at all.

"This is a door-opening question. The answer must be calculated within three minutes, otherwise it will be replaced by another question." Gu Lingyan explained to Xu Lele while thinking about how to solve the problem.

There is a Mathematical Olympiad question on the screen. The title is: Two people, B, can complete 242 machine parts together. It takes A 6 minutes to make a part, and it takes 5 minutes for B to make a part. When completing this batch of parts, how many parts did each of them make?

"A did 110, and B did 132." While Gu Lingyan was still thinking about the answer, Xiao Mengmeng had already told the answer in advance.

"Congratulations, you got the answer right. The door is open." Before Gu Lingyan could react, the screen showed that the answer was correct and the door opened.

"The door is open!" Xu Lele pointed at the door excitedly and said.

"Sister, how do you know the answer?" Gu Lingyan looked at Xiao Mengmeng in shock and asked.

"Brother Xiaotian told me a similar question before. Assume that A has done n, then B has done (242-n), 6=5(242-n)=110, which gives A's Quantity, then B uses 242-110=132 (pieces)." Xiao Mengmeng looked at Gu Lingyan and replied seriously.

"Well, Mengmeng is so awesome! She answered such a difficult question all at once." Gu Lingyan was not unhappy because Xiao Mengmeng answered it before her. Instead, she was happy for Xiao Mengmeng.

"Shall we go in quickly?" Xu Lele urged.

"Yeah, hurry up, there are still two levels left!" Hearing Xu Lele's reminder, Gu Lingyan quickly picked up Xiao Mengmeng and walked in. Xu Lele and Jin Ling followed them in.

"Why is it so troublesome to go to a classroom?" Xu Lele complained dissatisfied.

"This is why I don't like coming to this classroom. I'm too lazy and don't want to use my brain." Gu Lingyan said with a look of disgust.

"Is that the next question?" Jin Ling said, pointing to the screen on the door in front.

"Hmm, let's see what the topic is this time?" Gu Lingyan led them over.

The question is: Guess a word for ‘half-written Jiangcun pairs of frowning’.

"It's a guessing game. There are three questions in total. If you guess them all correctly, we can pass." Gu Lingyan glanced at the screen and said.

"Then what is the answer?" Xu Lele and Jin Ling couldn't understand the words written on the screen at all.

"The water is as deep as the fire." Gu Lingyan quickly gave the answer.

After answering correctly, the next question appeared on the screen: Heart, neither left nor right, neither up nor down (type one word).

"The word 'loyalty' means 'loyalty', neither left nor right nor up nor down is 'center'." Gu Lingyan guessed the answer to the second question effortlessly.

Soon the third question appeared on the screen: Meet at the broken bridge after thousands of miles (type one word).

The third question made Gu Lingyan hesitate for a while and did not give the answer immediately.

"Proud 'Jiao'!" Xiao Mengmeng shouted the answer when Gu Lingyan hesitated.

After the words "Correct answer, door open" were displayed on the screen, the door opened as before.

"Mengmeng, you are so awesome! We two can't understand what is written on it at all!" Jin Ling looked at Xiao Mengmeng with admiration and said.

"Yes! Yes! I understand the words above, but I can't understand them when they are connected." Xu Lele touched the back of his head and said.

"No! This is what Brother Xiaotian taught me before." Xiao Mengmeng said in a low voice with some embarrassment.

"Shall we leave quickly?" Gu Lingyan led them forward, and soon they came to the third gate.

This time it was another Mathematical Olympiad question, requiring the answer to be given within three minutes. The question is: There is a four-digit number, and the sum of the digits is equal to 34. What four-digit numbers meet this condition?

“8899、8989、8998、9889、9898、9988、7999、9799、9979、9997。”顾凌烟平静的把符合条件的四位数一一报了出来。

"Congratulations on passing all the levels, the door has been opened for you, I wish you a wonderful campus life today!" These thirty words appeared on the screen, and the classroom door was opened.

"Follow me closely, don't talk nonsense when you go in, and be careful not to hit anything, okay?" Before entering the classroom, Gu Lingyan turned to Xu Lele and Jin Ling and told them.

"Yeah, we promise that we will never cause any trouble to Sister Yanyan!" Xu Lele and Jin Ling raised their hands and said in assurance.

"Keep your voice down." Gu Lingyan put a finger to her mouth and whispered.

"Oh." Xu Lele and Jin Ling quickly covered their mouths and nodded.

"Follow me!" Gu Lingyan took Xiao Mengmeng's hand and led them into the classroom.

This classroom is large, but there are not many students, probably only eight or nine. The classroom is quiet, everyone is busy doing their own things, and there is no change at all because of their arrival. They don't even raise their eyes.

Gu Lingyan pulled Xiao Mengmeng, Xu Lele and Jin Ling towards the seat in the corner without looking away. Yes, that was Xia Tian's seat. She saw him as soon as she came in.

"Brother Xiaotian!" Xiao Mengmeng shouted excitedly after looking at Xia Tian.

"Mengmeng? Why are you here?" Xia Tian originally thought he was hallucinating, but when he looked up, he saw little Mengmeng standing next to him looking at him with a happy face.