Question

find the highest common factor of 77,91 and 143​

Answer 1

Given:

• Three numbers are $77$, $91$ and $143$​.

To Find:

• The highest common factor of  $77$, $91$ and $143$​.

Solution:

Factorize each number

             $77 = 1 \times 7 \times 11$

            $91 = 1 \times 7 \times 13$

            $143 = 1 \times 11 \times 13$

There is no common factor except 1

           HCF$(77, 91, 143) = 1$

Thus, $1$ is the highest common factor of  $77$, $91$ and $143$​.