Two numbers are in the ratio 3 : 4. Their LCM is 84 . The greater number is: 

HCF and LCM of two numbers are 7 and 140 respectively. If the numbers are between 20 and 45, the sum of the numbers is: 

Four bells ring at the intervals of 5, 6, 8, and 9 seconds. All the bells ring simultaneously at the same time. They will again ring simultaneously after: 

Two numbers are in the ratio 3 : 4. Their L.C.M. is 84. The greater number is 

The HCF and LCM of two numbers are 3 and 2730 respectively. If one of the numbers is 78, find the other number.

The HCF of two numbers is 96 and their LCM is 1296. If one of the numbers is 864, the other is

Two pipes of length 36 metre and 40 metre are to be cut into equal pieces without leaving any extra length of pipe. Find the number of such pieces if pipes are to be cut of maximum length.

The least number, which is a perfect square and is divisible by each of the numbers 16, 20 and 24 is