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AMC 10/12
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Topic 02

Topic 2 · Number Theory

Modular arithmetic, divisors, primes, gcd/lcm and bases.

0 / 6 sections complete · 4 chapters
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Chapter 1Pro

Modular arithmetic & divisors

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    Modular Arithmetic
    ~15 min·practice inside
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  • 🔒
    Counting Divisors
    ~14 min·practice inside
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Chapter 1 Cheatsheet
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Chapter 1 Quiz
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Chapter 2🔒 Locked

Primes, GCD/LCM & bases

Finish every section in Chapter 1 to unlock.

  • 🔒
    Prime Factorization, GCD & LCM
    ~16 min·practice inside
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    Digits & Number Bases
    ~15 min·practice inside
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Chapter 2 Cheatsheet
4 key formulas · always available · printable
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Chapter 2 Quiz
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Chapter 3🔒 Locked

Advanced: Fermat, Euler & CRT

Finish every section in Chapter 2 to unlock.

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    Fermat, Euler & CRT
    ~17 min·practice inside
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Chapter 3 Cheatsheet
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Chapter 3 Quiz
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Chapter 4🔒 Locked

AMC 12 · 1% problems

Finish every section in Chapter 3 to unlock.

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    Orders of Elements (Modular)
    ~16 min·practice inside
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Chapter 4 Cheatsheet
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Chapter 4 Quiz
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