Question

what is the HCF of 144, 198 by prime factorization

Answer 1

144=2*2*2*2*3*3
198=2*3*3*11
hcf=2*3*3
HCF=18

Answer 2

144=2×2×2×2×3×3
198=2×3×3×11

HCF(144,198)=2×3×3
                       =18