The GCF of 12 and 15 is 3.
factors of 12: 1, 2, 3, 4, 6 and 12.
factors of 15: 1, 3, 5, and 15.
common factors 1 and 3. Since 3 > 1, 3 is the Greatest Common Factor.
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Factors of 12: 1, 2, 3, 4, 6, and 12.
Factors of 15: 1, 3, 5, and 15
Common factors: 1 and 3
Highest common factor: 3
The word "GREATEST" is a superlative adjective and that means there can be only one.
GCF(12, 15) = 3.
The greatest common factor of the numbers 15 and 12 is 3.
There is no "greatest common multiple" for any pair of numbers. If you meant greatest common factor, the answer is 3.
The GCF is... 1! 1 is the only factor common to all three numbers.
The Greatest Common Factor of 15, 35, 54: 1
The Greatest Common Factor of 8, 10, 15: 1