Question

Am I doing this right?

Answer 1

GCF(16, 14) = 2   Note: 14 is not divisible by 4.
GCF(24, 32) = 8 because
  24 = 2 x 2 x 2 x 3
  32 = 2 x 2 x 2 x 2 x 2   GCF = 2 x 2 x 2 = 8
GCF(10w, 5w) = 5w  because the w is a common factor, too.
GCF(16xy, 24xy) = 8xy  because x and y are factors common to both
GCF(21ab, 35a) = 7a because a is a common factor, but b is not
GCF(10jk, 15k) = 5k
GCF(3mn, 9mn, 12mn) = 3mn