The factors of 18 are 1, 2, 3, 6, 9, and 18.
The factors of 45 are 1, 3, 5, 9, 15, and 45.
The common factors of 18 and 45 are 1, 3, and 9.
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The greatest common factor of 18 and 45 is 9.
9 is a factor of both 18 and 45, and is the largest factor of itself, so 9 is the greatest common factor.One way to determine the greatest common factor is to find all the factors of the numbers and compare them.The factors of 9 are 1, 3, and 9.The factors of 18 are 1, 2, 3, 6, 9, and 18.The factors of 45 are 1, 3, 5, 9, 15, and 45.The common factors are 1, 3, and 9. Therefore, 9 is the greatest common factor.The greatest common factor can also be calculated by identifying the common prime factors and multiplying them together.The prime factors of 9 are 3 and 3.The prime factors of 18 are 2, 3, and 3.The prime factors of 45 are 3, 3, and 5.The prime factors they all have in common are 3 and 3, so the greatest common factor is 3 x 3 = 9.WHAT? evry gcf # has to be PRIME only? HELP!!!!!!!!
The factors of 18 are:1, 2, 3, 6, 9, 18The factors of 39 are:1, 3, 13, 39The factors of 45 are:1, 3, 5, 9, 15, 45The common factors are:1, 3The Greatest Common Factor (GCF) is:3
The GCF of 18 27 and 45 is 9.The factors of 18 are 1, 2, 3, 6, 9, and 18The factors of 27 are 1, 3, 9, and 27The factors of 45 are 1, 3, 5, 9, 15, and 45The common factors are 1, 3, and 9The greatest common factor is 9The GCF is 9.
The common factors of 45 and 63 are 1, 3, and 9.