Question

Question #d080b

Answer 1

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`.