Find the greatest common factor (GCF).

Question

45 and 9

Answer 1

To find the greatest common factor (GCF) of 45 and 9, we can follow these steps:

1. Find the factors of each number:

   • The factors of 45 are: 1, 3, 5, 9, 15, 45
   • The factors of 9 are: 1, 3, 9

2. Identify the common factors:

   • The common factors of 45 and 9 are: 1, 3, 9

3. Choose the greatest common factor:

   • The greatest common factor is 9.

Thus, the GCF of 45 and 9 is 9.