The GCF is 3.
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3 is the greatest common factor of 9 and 12.
three
The greatest common factor of the numbers 40 and 40 is 9.
The GCF is 3.
The factors of 9 are 1, 3, and 9. The factors of 12 are 1, 2, 3, 4, 6, and 12. The factors of 15 are 1, 3, 5, and 15. The common factors of 9, 12, and 15 are 1 and 3. Therefore, the least common factor (the smallest common factor) is 1.