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The GCF is 3.
2 numbers have a gcf of 3 = 3 & 6, 6 &9,...
There are infinitely many possible answers.
This is an impossible set of numbers. If the LCM was 36, and the GCF was 3, then the numbers would be 6X6.
1. Write out their prime factorizations. 2. Determine which prime factors are shared by all 3 numbers. 3. Multiply them together. 4. That product is the gcf.For example, the gcf of 84, 126, and 686 is 14 because1. 84=2x2x3x7126=2x3x3x7686=2x7x7x72. All three numbers share 2 and 7 as common prime factors.3. 2x7=144. 14 is the gcf