The HCF of two numbers is 21 and their LCM is 840. If one of the numbers is 49, then the other number is:

The HCF and the LCM of two numbers are 5 and 120, respectively. If the sum of the two numbers is 55, then the sum of the reciprocals of these two numbers is equal to:

The LCM of 1.2 and 2.7 is:

If the LCM of two numbers is 288 and their ratio is 4 : 9, then HCF of the numbers is : 

On dividing 256a²b²c² by 64a², we get

What is the L.C.M of 12, 36, 6 and 9?

The greatest common factor of two co-prime numbers will be

Find the LCM and HCF of 27 and 81.