The HCF of two numbers is 24. If sum of the numbers is 480, how many such pairs of numbers are possible?

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:

A number between 1000 and 2000 which when divided by 30, 36 and 80 gives a remainder 11 in each case is:

The LCM of two numbers is 48. If those numbers are in the ratio 2 : 3 then what will be their sum?

The number between 4000 and 5000 that is divisible by each of 12, 18, 21 and 32 is 

The smallest five digit number which is divisible by 12, 18 and 21 is:

The LCM of four consecutive numbers is 60 The sum of the first two numbers is equal to the fourth number. What is the sum of four numbers? 

The L.C.M. of two numbers is 1820 and their H.C.F. is 26. If one number is 130 then the other number is: