Hi there, I will help you!
The GCF is something I have learned before.
Greatest
Common
Factor
If you want to know how to solve the GCF of 18 and 14, I will show you then.
First it's like comparing the number from each other.
The Values 18, 24
The Factors or 18 are: 1, 2, 3, 6, 9, 18
The Factors of 24 are: 1, 2, 3, 6, 8, 12, 24
Your probably thinking isn't 1, 2 and 3 GCF since they both have the same numbers, but the greatest and common number is 6 because they both are the same and its the greatest number. That's why this is called the GCF for a reason.
The GCF = 6
Hope this helps! :)