Kin Y. Li: Math Problem Book I Compiled By

Challenges the reader with counting principles, graph theory, and pigeonhole principle applications.

For students in Hong Kong and globally, this book has become a foundational text. Its primary value lies in its . Li filters out "busy work," ensuring that every problem introduces a new nuance or reinforces a critical strategy. For a student aiming for a medal in the IMO or the Putnam Competition, working through this book builds the "mental stamina" required for multi-hour exams. Conclusion Math Problem Book I compiled by Kin Y. Li

Each section is designed to progress in difficulty. The early problems establish fundamental techniques, while the later "challenge" problems require the synthesis of multiple concepts—a hallmark of IMO-level tasks. Pedagogical Philosophy Challenges the reader with counting principles