Since 39 is a factor of 78, all of its factors are common.
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The greatest common factor of the numbers 3, 4, 8 and 9 is 1.
Factors of 8 = 1,2,4,8 Factors of 15 = 1,3,5,15 The highest common factor is 1
The greatest common factor of 9 and 33 is 3It is: 3
The greatest common factor (GCF) of 21 and 9 is 3.
The greatest common factor of 9 and 618 is 3