The intersection contains the only common factor, which is 3. On the left are the factors of 231 that are not factors of 195; i.e., 7 and 11. On the right are the factors of 195 that are not factors of 231; i.e., 5 and 13.
The GCF is the product of all the numbers in the intersection (in this case, just the 3). The GCF is 3.
The LCM is the product of all the numbers in the Venn diagram: 7 11 3 5 13 = 15,015. The LCM is 15,015.
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