The GCF is 1.
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The prime factors are: 15 = 3 * 5 35 = 5 * 7 75 = 3 * 5 * 5 So the greatest common factor is 5.
The greatest common factor of 30 and 39 is 3.
The greatest common factor of 24 and 57 is 3.
The greatest common factor of 3 and 57 is 3
To find the greatest common factor (GCF) of 15, 35, and 45, we first need to factorize each number. The factors of 15 are 1, 3, 5, and 15. The factors of 35 are 1, 5, 7, and 35. The factors of 45 are 1, 3, 5, 9, 15, and 45. The greatest common factor among these three numbers is 5, as it is the largest factor they all share.