Question

Which expression represents the greatest common factor (GCF) of 54 and 153?

A. 2 x 2
B. 3 x 3
C. 2 x 2 x 2 x 3
D. 2 x 2 x 2 x 3 x 17

Answer 1

Answer: B. 3 x 3

Step-by-step explanation:

54 = 9 x 6 = 3 x 3 x 6

153 = 9 x 17 = 3 x 3 x 17

We see that 3 x 3 = 9 shows up in each factorization, which is the largest common factor between the numbers. Therefore, the GCF is 3 x 3