A farmer has 945 cows and 2475 sheep. He farms them into flocks, keeping cows and sheep separate and having the same number of animals in each flock. If these flocks are as large as possible, then the maximum number of animals in each flock and total number of flocks required for the purpose are respectively 

Three bells ring simultaneously at 11 a.m. They ring at regular intervals of 20 minutes, 30 minutes, 40 minutes respectively. The time when all the three rings together next is:

The LCM of three different numbers is 120. Which of the following cannot be their HCF? 

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 12 and 924 respectively. Then the number of such pairs is: 

The least number to be subtracted from 36798 to get a number which is exactly divisible by 78 is 

The LCM of two multiples of 12 is 1056. If one of the numbers is 132, the other number is 

When a number is divided by 15, 20 or 35, each time the remainder is 8. Then the smallest number is