9, 12, and 15 have the gcf of 3.
9: 1,3,9
12: 1,2,3,4,6,12
15: 1,3,5,15
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This is an impossible set of numbers. If the LCM was 36, and the GCF was 3, then the numbers would be 6X6.
The GCF is 3.
The only factor that all of these numbers share is 1 since 3 and 5 are prime. So 1 is the gcf of this set of numbers.
The greatest common factor, or GCF, is the largest positive integer that will divide evenly with no remainder into all the members of a given set of numbers. The GCF of 6 and 9 is 3.
2 numbers have a gcf of 3 = 3 & 6, 6 &9,...