The book encourages "tool-switching." A problem that looks like a geometry puzzle may be solved more elegantly using trigonometry or complex numbers, teaching students to look at problems from multiple angles. Impact on Competitive Performance
Explores modular arithmetic, Diophantine equations, and the properties of prime numbers. Math Problem Book I compiled by Kin Y. Li
Focuses on functional equations, inequalities (including Cauchy-Schwarz and AM-GM), and complex polynomial identities. The book encourages "tool-switching