How to Find the Greatest Common Factor for 9 and 12

How to Find the Greatest Common Factor for 9 and 12: 1. List the factors of each number: Factors of 9: 1, 3, 9 Factors of 12: 1, 2, 3, 4, 6, 12 2. Identify the common factors: Common factors of 9 and 12: 1, 3 3. Select the greatest common factor: The greatest common factor (GCF) is 3. So, the GCF of 9 and 12 is 3.