Number Theory Nexus

Levels 43–99 · numberTheory

A mystical realm of primes and divisors. Master GCD, LCM, and the secrets hidden in every number.

Study Before You Play

Brush up on these topics to sharpen your skills for this zone.

Number Theory Basics

Explore prime numbers, divisibility, GCD, LCM, and modular arithmetic fundamentals.

Prime Numbers

Understand what prime numbers are, how to identify them, and why they matter.

GCF & LCM

Learn to find the Greatest Common Factor and Least Common Multiple of two or more numbers.

Factors & Multiples

Learn the difference between factors and multiples, and find GCD and LCM.

Divisibility Rules

Learn quick tricks to tell if a number is divisible by 2, 3, 5, 10, and other numbers.