Question

What is the greatest common factor (GCF) of 51 and 68?
A. 12
B. 3
C. 17
D. 2

Answer 1

the answer is C, 17. The factors of 51 are 1,3, and 17. The factors of 68 are 1,2,4,17, and 34. 17 is the GREATEST common factor

Answer 2

Factors of 51: 1, 3, 17, 51

Factors of 68: 1, 2, 4, 17, 34, 68

As you can see the greatest common factor of both numbers is 17.

Therefore, the answer is C.

Best of Luck!