Question

What is the greatest common factor of 12 and 20?
10
6
4
5

Answer 1

4

Explanation:

10 does go into 20, but not 12

6 goes into 12, but not 20

5 goes into 20, but not 12

4 goes into both

other common factors are 2, but 4 is the greatest common factor (GCF)

Hope this helps :-)