Question

Which of the following is the greatest common factor of 20 and 28?

A.2
B.4
C.48
D.140

Answer 1

4

Explanation:

It is the greatest number that can be multiplied by something else to get both 20 and 28

Answer 2

B.4

Explanation:

20 = 2 * 2 * 5

28 = 2 * 2 * 7

GCF = 2*2 = 4