Question 207559


First, list the prime factorization of each number. If you need help with prime factorization, check out this <a href="http://www.algebra.com/algebra/homework/divisibility/factor-any-number.solver">solver</a>.



12: 2*2*3



18: 2*3*3



Now highlight the factors that the two numbers share in common



12: 2*<font color="red">2*3</font>



18: <font color="red">2*3</font>*3



Now pick one set of these highlighted numbers and multiply


2*3=6


So the GCF of 12 and  18  is 6