![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/step1.JPG\")
Greatest common factor (GCF) is a number that is greatest among the
\common factors of the numbers.
\List the factors of each number.
\Factors of 32 : 2, 4, 8, 16, 32
\Factors of 55 : 5, 11, 55 \ \ There are no common prime factors.
\Two numbers always have 1 as a common factor. So, the GCF is 1![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/solution.JPG\")
There are no common prime factors.
\Two numbers always have 1 as a common factor. So, the GCF is 1.