The HCF of two numbers is 21 and their LCM is 840. If one of the numbers is 49, then the other number is:

Find the LCM of the fractions , and

The greatest common factor of two co-prime numbers will be

Which of the following numbers is divisible by 11?

Two pipes of length 1.5 m and 1.2 m are to be cut into equal pieces without leaving any extra length of pipes. The greatest length of the pipe pieces of same size which can be cut from these two lengths will be

The LCM of 1.2 and 2.7 is:

By what least number should 21600 be multiplied to make it a perfect square?

The HCF of three numbers 98, 175 and 210 will be: