Question

What is the GCF of 45 and 60?

Answer 1

The GCF of 45 and 60 is 15.

Explanation:

First let us find the factors of 45 and 60.

`\left[\begin{array}{ccc}&45&\\15&*&3\\5*3&&\end{array}\right]`
`\left[\begin{array}{ccc}&60&\\15&*&4\\5*3&&2*2\end{array}\right]`

Based on this, you can tell that they both have the number 3 and the number 15 in their factors.

15 > 3

The GCF of 45 and 60 is 15.