Which expression represents the gcf of 154 and 196.

choices-
a)2 x 7
b)2 x 2 x 7
c)2 x 7 x 7
d)2 x 2 x 7 x 7 x 11

Answer=A

To find the gcf, we need to factor each number.

154=2*7*11

196=2*2*7*7

The number have a factor of 2 and a factor of 7 in common, so...

GCF=2*7