Number Theory Worksheets 🖨️
Discovering the Building Blocks of Math
1. Primes & Composites
A prime number can only be divided evenly by 1 and itself (e.g., 2, 3, 5, 7, 11). A composite number has more than two factors (e.g., 4, 6, 8, 9). Identifying them is the first step in mastering number theory.
2. Greatest Common Divisor
The GCD (also called Greatest Common Factor) is the largest positive integer that divides two numbers without a remainder. For example, the GCD of 12 and 18 is 6. This skill is vital for simplifying fractions.
3. Modular Arithmetic
Often called "clock math," the modulo operation finds the remainder after division. For example, $14 \pmod 5$ is $4$, because 14 divided by 5 leaves a remainder of 4. This is the math that keeps computer cryptography secure!