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.

The HCF and LCM of two number are 20 and 120, respectively. If one number is 50 percent more than the other number, then which is the smaller number.

The number 5769116 is divisible by which of the following numbers?

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

The greatest number, which when divides 989 and 1327 leave remainder 5 and 7 respectively: 

The LCM of two consecutive even numbers is 144, find the numbers?

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

What is the highest common factor of 2x³ + x² -x -2 and 3x³- 2x² + x - 2 ?