Question #d080b

1 Answer
Jan 6, 2018

4

Explanation:

To find the GCF of any two numbers, you have to get the prime factorization of the two numbers:

#12 = color(red)2 \times color(red)2 \times 3#

#20 = color(red)(2) \times color(red)2 \times 5#

The GCF of these two numbers is gotten by multiplying all of the common numbers in the prime factorization (in red).

Thus, the GCF of 12 and 20 is #2\times2=4#.