2023-02-26

How to find the greatest common factor of 14 42 91?

disgynnaigwk

Each number is first written as the sum of its prime factors. Here we have $14$, $42$ and $91$ and their prime factors are
$14=2×7$
$42=2×3×7$
$91=7×13$
Now list all the common factors (if any prime is occurring more than one time in each number pick up as many times it is spearing in all the numbers).
In above case, however, we have just $7$, which repeats in all.
Hence, here $7$ is greatest common factor.

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