Question

Which of the following is the greatest common factor of 18 and 45?

A.3
B.9
C.63
D.810

Answer 1

B

Explanation:

It is the greatest number that can be multiplied by both to get 18 or 45

Answer 2

B. 9

Explanation:

18 = 3 * 3 *2

45 = 3 *3 * 5

GCF = 3 * 3 = 9