He solved 50 problems daily. The "Hints & Solutions" section at the back became his teacher. When he got a question wrong, he wouldn’t just read the answer; he would re-solve the entire concept on a separate page.

The results flooded his screen. He clicked a link and found himself staring at a scanned copy of a legendary book: by Dr. R. K. Gupta.

In the small, cramped room of a government school hostel in Bihar, a boy named stared at the massive syllabus for the upcoming Joint Entrance Examination (JEE). His financial situation was dire. Coaching classes were a distant dream, and buying multiple reference books was impossible. All he had was a second-hand smartphone with a patchy internet connection and a fierce determination.

One evening, frustrated by his lack of practice material, Rohan typed into a search engine: "Arihant Chemistry Objective Book PDF."