5 is the greatest common factor of 15 and 305.
15 factors to [3 5]
305 factors to [5 61]
common factors are [5] ■
5
A:5
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The Greatest Common Factor (GCF) is: 15
The greatest common factor for 15 and 16 is 1.
The greatest common factor of 15 and 55 is 5.
The greatest common factor of 15 and 32 is 1
The greatest common factor of 15,45, and 90 is 15.