![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/step1.JPG\")
Method 1:
\List the factors of each number.
\Factors of 32 : 2, 4, 8, 16, 32
\Factors of 55 : 5, 11, 55
\Identify the greatest common factor.
\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/step2.JPG\")
Method 2:
\Write the prime factorization of each number.
\32 = 2 × 2 × 2 × 2 × 2.
\55 = 5 × 11.
\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.