Mathematical Olympiads 2000-2001: Problems And ... – Recommended
: Features problems from 27 national and regional mathematical contests held around the world during the 2000–2001 period.
Before diving into the book's complex problems, ensure proficiency in the following core areas: Mathematical Olympiads 2000-2001: Problems and ...
If the problems in the 2000–2001 collection feel too advanced, bridge the gap with these highly recommended texts : : Features problems from 27 national and regional

