![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/step1.JPG\")
Method 1:
\List the factors of each number.
\Factors of 120 : 2, 3, 4, 5, 6, 10, 12, 24, 30, 40, 60, 120 \ \
\Factors of 960 : 2, 3, 4, 5, 10, 12, 20, 24, 30, 40, 48, 96, 120, 240, 480, 960 \ \
\Identify the greatest common factor.
\The greatest common factor of 120 and 960 is 120.![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/step2.JPG\")
Method 2:
\Write the prime factorization of each number.
\120 = 2 × 2 × 2 × 3 × 5.
\960 = 2 × 2 × 2 × 2 × 2 × 2 × 3 × 5.
\The GCF is the product of the common prime factors in each number.
\GCF = 120.
\The greatest common factor of 120 and 960 is 120.![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/solution.JPG\")
The greatest common factor of 120 and 960 is 120.