Answer:
8
Step-by-step explanation:
The way to find the GCF¨S for 40 and 72:
40= 1,2,4,5,8,10,20,40
72= 1,2,3,4,6,8,9,12,18,24,36,72
(bolded numbers are the factors they have in common)
the greatest of them all is 8, as you can see
I hope I helped you get the answer to your question!!! ^_^
