Answer: I’m not 100% certain, but I believe the GCF is 6s.
Explanation: All of the above terms have at least one variable, but because one of those terms (18s) only has one variable, you can’t exceed that number. From what I tried, 6 is the highest number that can divide all of the numbers evenly.
24/6 = 4
12/6 = 2
18/6 = 3
Hopefully this has been helpful! (And I’m sorry it’s not the best thought out answer because my brain seems to not be working properly, haha)