Chapter 1107 Sister

Gu Yang secretly made up her mind to let the children in the orphanage have books to read and not let such a genius be buried!

After solving her problem, Gu Jin also casually wrote an equation on the blackboard, but it was just a quadratic equation.

Then he gave the chalk to Gu Yang and signaled her with his eyes to do the problem.

Gu Yang blinked, "Haven't you seen the quadratic equation yet?"

Gu Jin raised his chin slightly, proud and arrogant: "Draw inferences from one example. Do you know how to do it? Do you want me to teach you?"

Gu Yang thought to herself, this little brat is arrogant, but he looks cute.

Gu Yang suddenly wanted to stretch out her claws to pinch Gu Jin's face, but just when she was about to move, Gu Jin stretched out his hand and pinched her face first.

Gu Yang was confused.

Gu Jin: "No?"

Gu Yang hummed, picked up the chalk to solve the problem, and wrote a college calculus problem on the blackboard.

It's time to show real skills!

Sure enough, after she finished writing, Gu Jin looked at the problem and was at a loss, her eyebrows were twisted together, and she stared at the problem intently.

Gu Yang put her hands on her hips and said proudly: "What? You don't know how to do it? Do you want me to teach you?"

Gu Jin stared at the problem for a long time, and she didn't even understand what some of the symbols meant, so she frankly admitted that she really didn't know how to do it.

She gave the chalk to Gu Yang: "Here, come here, tell me how to solve it."

Gu Yang twirled the chalk with her little fingers, and said proudly: "Call me sister."

Gu Jin remained calm: "Call me what?"

Gu Yang: "Sister."

Gu Jin nodded seriously: "Yes. You will be my sister from now on."

Gu Yang: "..."

Gu Yang's smile disappeared.

This little brat, how could he be so tricky at such a young age?

Gu Jin poked Gu Yang's forehead again, "Are you unhappy? I won't be someone else's sister everywhere. If you call me sister, you will be my only sister from now on."

Gu Yang, who was always someone else's sister: "..." She was touched.

Never mind, she was an adult by nature, and couldn't argue with this little brat.

It was childish of her to use a college question to embarrass an elementary school student.

She picked up the chalk and wrote the steps on the whiteboard while explaining: "This question..."

Gu Jin listened carefully and did not interrupt Gu Yang in the middle.

Gu Yang was a little surprised. Could it be that he understood everything?

Then he heard Gu Jin asked a series of questions: "What do these symbols mean?"

Gu Yang saw that she was eager to learn, so he explained them one by one.

Gu Jin also drew an ∞ symbol on the blackboard: "Infinite? Why use this symbol to represent infinity?"

Gu Yang picked up the waste paper on the podium, folded it into a paper strip, rotated it half a circle and pinched the two ends to make a simple Möbius strip. "This is called a Möbius strip. If someone walks on it, it will keep going along the path it sees and will go on forever. This path is endless.

And you see, this Möbius strip looks very similar to this infinity symbol."

Gu Jin took the Möbius strip from Gu Yang's hand, moved his fingers along the paper strip, and found that it had indeed returned to the starting point, and his eyes became even more interested.

"There is only one side! There is really no end. What if someone really falls into the Möbius belt?" Gu Jin frowned, looking serious, thinking about this problem seriously.

Gu Yang was slightly stunned.

If someone really falls into the Möbius belt...

then he will try his best to move forward, and eventually return to the starting point, and will never reach the end until he dies.

Gu Yang felt something flashing in his mind, but he couldn't catch it.