Which of the following is an earth-observation

The HCF and LCM of two numbers, A and B, are 14 and 196, respectively. The difference between these two numbers is 28. Find their sum.

Determine the total count of prime factors in the product: 21⁷ x 19⁷ x 10⁷

Let N be the greatest number that will divide 89, 110, 131 leaving the same remainder in each case. Then sum of the digits in N is:

The least number which when divided by 8, 10, 12 and 15 leave zero remainder in each case and when divided by 16 leaves a remainder of 8 is:

Find the greatest number of 4 digits divisible by 15, 25, 40 and 75.

The LCM of two numbers is 4 times of their HCF. The sum of LCM and HCF is 320. If one of the number is 256, then the other number is:

The HCF of two numbers is 21. Which of the following can never be their LCM?

Find the smallest number which when divided by 3, 4, 5 and 6 gives remainder ‘2’ in each case?

The LCM and the HCF of the numbers 42 and 60 are in the ratio:

What is the HCF of 4/5, 6/8, 8/25 ?