# How do you find the greatest common factor of 25, 55?

Dec 1, 2016

$g c f \left(15 , 55\right) = 5$

#### Explanation:

factors 25:$\text{ } \left\{1 , 5 , 25\right\}$

factors 55:$\text{ } \left\{1 , 5 , 11 , 55\right\}$

common factors:$\text{ } \left\{1 , 5\right\}$

$g c f \left(15 , 55\right) = 5$