Question

Find the HCF of the following numbers: $13,65,117$.

Answer 1

First, we need to find out the prime factorization of given numbers:

So $13=13\times 1$

$65=5\times 13$

$117=3\times 3\times 13$

So the common prime factor of $13,65,117$ is only $13$.

Hence the HCF is 13.