Q. What is the greatest common factor of 9 and 18?_____
List Factors of 9: List the factors of 9. Factors of 9: 1, 3, 9
List Factors of 18: List the factors of 18.Factors of 18: 1, 2, 3, 6, 9, 18
Identify Common Factors: Identify the common factors of 9 and 18.Common factors: 1, 3, 9
Find Greatest Common Factor: Find the greatest common factor (GCF). The greatest common factor is 9, since it's the largest number common to both lists.