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Pure mathematics · Olympiad · university
Number Theory
Primes, divisibility, and modular arithmetic — the queen of mathematics.
11 chapters · 148 curated · 3,637 from open sources · 10.3 billion generated
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Chapters
Chapter 1Divisibility2,168 problemsChapter 2Prime numbers74 problemsChapter 3GCD & LCM392 problems · 10.1 billion practiceChapter 4Modular arithmetic17 problems · 196.6 million practiceChapter 5Congruences0 problems · 8.4 million practiceChapter 6Diophantine equations50 problemsChapter 7Digits1,042 problemsChapter 8Scales of notation36 problems · 16 million practiceChapter 9Arithmetic functions6 problems · 2.1 million practiceChapter 10Continued fractions0 problems · 1 million practiceChapter 11Quadratic residues0 problems · 45,265 practice