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A problem‑based compendium designed to build deeper skill in number theory through 104 selected problems drawn from the training of the United States International Mathematical Olympiad (IMO) team. Starting with a comprehensive introduction to foundational ideas, the book progresses through both introductory and advanced problems used in elite competition training, with complete solutions provided. It introduces key techniques and strategies used in Olympiad‑level number theory, bridging standard high‑school material and more abstract, contest‑level reasoning. This text is widely used by advanced high‑school students, undergraduate competitors, and coaches preparing for national and international mathematical contests.

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245: $a: 104 Number Theory Problems: From the Training of the USA IMO Team
245: $b:
082: $a:
100: $a: Titu Andreescu & Dorin Andrica & Zuming Feng
650: $a: Mathematics
250: $a:
440: $v:
250: $b: Birkhäuser
250: $c: 2007
020: $a: 9780817645618
300: $a: 204