Question

8. Using prime factorization method, find HCF and LCM of 72,126and168. Also
show that HCF LCM product of the three numbers.​

Answer 1

72=2×2×2×3×3

126=2×3×3×7

168=2×2×2×3×7

HCF=2×3

=6

LCM=2×2×3×3×7×2×2×7

=2⁴×3²×7²

=16×9×49

=7056

LCM×HCF= products of three number

6×7056=72×126×168

42336= 42336

Hence proved