Question

How do you find the GCF of 40 and 100?

Answer 1

See the entire solution process below:

Explanation:

To find the GCF (Greatest Common Factor) we need to factor each number separately and then find the all the common factors:

`40 = 2 xx 2 xx 2 xx 5`

`100 = 2 xx 2 xx 5 xx 5`

The common factors are:

`40 = color(red)(2 xx 2) xx 2 xx color(red)(5)`

`100 = color(red)(2 xx 2) xx color(red)(5) xx 5`

Or

`color(red)(2 xx 2 xx 5) = 20`

The GCF is `20`