Lesson 14 — Greatest Common Factor (GCF)

🎯 Goal

Learn to find the largest number that divides two or more numbers exactly.

📖 Lesson Description

The Greatest Common Factor (GCF) of two numbers is the largest number that divides both numbers without remainder.

🔎 Examples

• Factors of 12 → 1,2,3,4,6,12
• Factors of 18 → 1,2,3,6,9,18
• Common factors → 1,2,3,6 → GCF = 6

✏️ Practice

1. Find GCF of 8 and 12.
2. Find GCF of 15 and 25.
3. Find GCF of 24, 36, and 60.