Question

What are all the common factors of 28 and 42?


A.
1, 2, 7, 14


B.
1, 7, 14


C.
1, 2, 7, 14, 28


D.
1, 2, 4, 14, 28

Answer 1

a

Answer 2

That's what i thought just needed a second opinion

Answer 3

factors of 28:

1 x 28
2 x 14
4 x 7

factors of 42:

1 x 42
2 x 21
3 x 14
6 x 7

common factors:
1, 2, 7, 14