Challenges the reader with counting principles, graph theory, and pigeonhole principle applications.
By presenting problems that cannot be solved by rote memorisation, Li forces the student to experiment, fail, and eventually find the "trick" or "key" that unlocks the solution. Math Problem Book I compiled by Kin Y. Li
If you would like to refine this further, I can help if you tell me: Challenges the reader with counting principles
The solutions provided are not just answers; they are models of mathematical brevity. They teach students how to write rigorous proofs that are both logical and aesthetically pleasing. Li forces the student to experiment