"So you can solve it like this, An'an, you're really impressive. My cousin always calls me a study slacker; he should compete with you, An'an."
Xu Ling'an capped her pen and waved her hand quickly, "I've seen similar problems before. If it were a different type, I'd be stumped too."
Wei Minmin didn't spare a thought for her cousin, "Even if he had seen it, he might not be able to solve it. But this solution process is really complicated!"
"Actually, there's a more straightforward method, but it involves college-level math. With high school knowledge, you can only solve it this way."
Jiang Lingxi patted Xu Ling'an's head and handed over a drink that Lu Zhengzheng had just brought, "You've worked hard, have something to drink."
"What are you guys talking about?"
All three looked up to see Wei Xiao holding a cup of fruit tea identical to the one in Xu Ling'an's hand, his other hand behind his back. No one knew when he had strolled over.
