A:

Here's how to solve for GCF and LCM. 

First, to set each of these up, I will be using the ladder method. To set up the ladder method, you need to put the 2 numbers you are solving for at the top, then a common divisor that results in a whole number for both, on the side. Divide, then repeat, until there's nothing left.
Now, let's talk about GCF. GCF, also known as Greatest Common Factor, can be solved by multiplying the circled numbers in the image labeled 'The Formula for GCF'.
For LCM, multiply the numbers shown in the image labeled 'The Formula of LCM'.