# Number theory

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Venn Diagram to Classify Numbers I really needed this on my last Math test...

OMG! 73.73 is the best number!!! Oh these guys...got to love them!

https://en.wikipedia.org/wiki/Number_theory

Formula sheet - Geometry

Introduction to Number Theory Learn the fundamentals of number theory from former MATHCOUNTS, AHSME, and AIME perfect scorer Mathew Crawford. Topics covered in the book include primes & composites, multiples & divisors, prime factorization and its uses, base numbers, modular arithmetic, divisibility rules, linear congruences, how to develop number sense, and much more.

This math unit on number theory has it all: Definitions Divisibility Rules Prime or Composite Factors Prime Factorization Greatest Common Factor (2 methods!) Least Common Multiple Practice and Enrichment Sheets