Question

given the LCM (77,99)=693,find the HCF (77,99)

Answer 1

Product of HCF*LCM=Product of numbers
HCF*693=77*99
HCF=77*99/693
HCF=7623/693
HCF=11

THEREFORE HCF of (77,99) is 11

Answer 2

As we know that,
HCF×LCM = Product of numbers
⇒HCF×693 = 77×99
⇒HCF = (77×99)/693 = 11