The ratio of HCF and LCM of two numbers a and b is 1:30 and the difference between the HCF and LCM is 493. Find the possible number of pairs of a and b.

A number of friends decided to go on picnic and planned to spend Rs. 108 on eatables. Three of them however did not turn up. As a consequence, each one of the remaining had to contribute Rs 3. extra. The number of them who attended the picnic was:

The HCF and LCM of two numbers are 12 and 336 respectively. If one of the number is 84, the other is

A milk in vendor has 21 liters of cow milk, 42 liters of toned milk and 63 liters of double toned milk. If he wanted to pack them in cans so that each can contains same liters of milk and does not want to mix any two kinds of milk in a can, then the least number of cans required is : 

The sum of two numbers is 84 and their HCF is 12. Total number of such pairs of number is 

If the ratio of two numbers is 13 : 15 and their L.C.M. is 39780. Then the numbers are?

If the product of three consecutive numbers is 210 then the sum of the smaller numbers 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?