Sleeps in class, eats hard, yet drops 90 points. Teacher: Secret’s out

In a sudden mathematics quiz, the class leader, a top student, scored merely 50 points, while the school beauty managed a mere 30 points, and the class representative and study committee member fared even worse. However, Jiang Nan, known for his propensity to doze off in class and his reputation as a voracious eater in the cafeteria, astonishingly achieved a staggering 90 points, securing first place. The mathematics teacher remarked, Kid, it seems your secret is out. The charming homeroom teacher inquired, What’s this, are you not going to reveal the truth? Fellow students exclaimed, Nan Shen, could it be that you are indeed a hidden academic genius? Jiang Nan humbly waved his hand, declaring, Everyone, please stop speculating; I am not an academic prodigy, merely the legendary score manipulator! Chapter 1: Passing an Exam, Is It Not a Simple Feat? Jiang Nan, have you awakened yet? A furious shout accompanied by shattered pieces of chalk came hurtling toward the slumbering Jiang Nan. Jiang Nan again? How audacious to sleep even during the examination overseen by the formidable female invigilator; he must be courting disaster. Many classmates anticipated his imminent downfall, convinced he was destined to meet a most unfortunate fate. Yet, in the next moment, the room fell silent in astonishment. Jiang Nan suddenly reached out and effortlessly swatted away the chalk hurtling toward him, all while his head remained resting on the desk. He continued to sleep soundly. Incredible, Nan Shen! Without even opening his eyes, he managed to deflect the invigilator's rapid-fire chalk projectiles. Truly impressive! This was several times more remarkable than any antics of Zhou Xingchi! I may not yield to walls, but I bow to Nan Shen! Surrounding classmates couldn’t help but express their awe. Well done! Hearing this, the beautiful homeroom teacher, Hu Yifei, was seething with anger. She stormed to Jiang Nan's desk and slammed it forcefully, demanding, Jiang Nan, get up! The force was considerable, and the sound jarring. Jiang Nan finally stirred, lifting his head and rubbing his bleary eyes, gazing at the beautiful yet furious Hu Yifei, lazily asking, Teacher, has the exam concluded? Hu Yifei was momentarily speechless, astonished that such an eccentric student existed in her class. Unsure whether to laugh or cry, she attempted to contain her ire and patiently advised, Jiang Nan, can you not take the exam seriously? Jiang Nan, appearing somewhat bewildered, replied casually, Well, I suppose I could pass. Hu Yifei, exasperated, retorted, Do not think that your previous passing scores are commendable. Do you truly believe you can pass this surprise mathematics quiz? Jiang Nan yawned and replied nonchalantly, I suppose so. Hu Yifei, as if hearing the greatest joke, joyfully responded, Jiang Nan, you seem quite confident! How about we make a wager? If you pass this exam, I shall not interfere with your sleeping habits in the future. However, should you fail, you must study diligently and refrain from sleeping during non-recreational hours. Really? In an instant, Jiangnan's heart fluttered as he gazed intently at Hu Yifei. Are you certain, Teacher, that as long as I pass this exam, you will no longer monitor my slumber during class? Absolutely, without a doubt! Hu Yifei affirmed with great conviction. Alright, it is settled then, Jiangnan replied with a smile, feeling remarkably composed within. Hu Yifei, taken aback by Jiangnan's unexpected agreement, momentarily displayed a hint of astonishment before resuming her invigilation duties. What a jest this mathematics examination was! The likelihood of Jiangnan passing was as improbable as the men's football team winning the World Cup. After all, she was acutely aware of the exam's difficulty level, which was undeniably akin to a hellish ordeal for ordinary high school seniors. Even Qin Yumo, the class monitor who consistently ranked first in the class and within the top ten of the year, might not guarantee a passing score, let alone Jiangnan, who merely hovered around the passing threshold. Meanwhile, as soon as Hu Yifei departed, Jiangnan promptly flipped over and reclined comfortably on his desk, drifting into a deep slumber. Was there any chance he would rouse himself to answer questions? Absolutely not. In fact, within the first ten minutes of the exam, he had completed all the questions, confidently assuring himself of a score in the nineties, without a single error. After all, he was a transmigrator. A year prior, he had succumbed to exhaustion while fervently typing, only to find himself transported to this parallel world, which bore a striking resemblance to his original one, equipped with his own system.