What is the gcf for 225 and 144?

Answer 1

225 = 3 x 75 = 3 x 3 x 25 = 3 x 3 x 5 x 5 144 = 3 x 48 = 3 x 3 x 16 = 3 x 3 x 2 x 2 x 2 x 2 Common factors are 3 twice so GCF is 3 x 3 = 9