A First Step to Mathematical Olympiad Problems
Derek Holton · Mathematical Olympiad series · 2009
About Problem Solving The Pigeonhole Principle Elementary Graph Theory - Konigsberg, Euler, Hamilton, Planarity Basic Number Theory - Divisibility, Fermat's Little Theorem Geometry of Elementary Shapes Proof - By Contradiction and Induction Cartesian Geometry and Loci A Discussion of Some IMO Level Problems.