The LCM of two positive integers is 660 and their HCF is 12. If one of the numbers is 132, what is the other number?

Let N be the greatest number that will divide 78, 109, 140 leaving the same remainder in each case. Then sum of the digits in N is:

How many pairs of natural numbers (x, y) exist such that x>y and the product of x, y and HCF (x, y) = 2520? solve this 

Ratio of two numbers 7:11 and their LCM is 1540. Find the sum of the given two numbers.

Find the least number of equal sizes square tiles which can be fitted in a rectangular room whose sides are 360 m and 480 m?

Find the HCF and LCM of 45, 60 and 75.

Find the least common multiple of (28/42), (35/49), and (14/21).

The product of two numbers is 2880 and their GCD is 24. What is the LCM?

Find the greatest number that will divide 245, 395 and 200 without leaving a remainder.

The greatest number, which when subtracted from 1063, gives a number exactly divisible by each of 15, 20, 30 and 35, is: