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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!!!!!!!!
Wiki User
∙ 14y ago
Wiki User
∙ 13y ago9
9x1=9
9x2=18
9x5=45
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What is the greatest common factor of 18 45 and 54?
9 is the greatest common factor of 18, 45 and 54.
What is the common factor of 18 and 45?
The greatest common factor of 18 and 45 is 9.
What is the greatest common factor of 18 36 and 45?
The Greatest Common Factor of 18, 36, and 45 is 9
What is greatest common factor of 18 45 and 72?
The GCF is 9.
What is the greatest common factor of 45 and 225?
The greatest common factor of 45 and 225 is 15.The GCF is: 45
What is the greatest common factor of 18 45 and 54?
9 is the greatest common factor of 18, 45 and 54.
What is the greatest common factor of 45 85 63 and 18?
The Greatest Common Factor of 45, 85, 63 and 18 is 1.
What is the greatest common factor of 18 30 45?
The GCF is 3.
What is the GCF of 18 45 and 144?
The greatest common factor (GCF) of 18, 45, and 144 is 9.
What is the common factor of 18 and 45?
The greatest common factor of 18 and 45 is 9.
What are the greatest common factors of 18 and 45?
The Greatest Common Factor (GCF) is: 9
What is the greatest common factor of 18 36 and 45?
The Greatest Common Factor of 18, 36, and 45 is 9
What is the greatest common factor of 18 45 54?
It is 9
What is greatest common factor 45 and 18?
The GCF is 9.
What is the greatest common factor for 18 and 45 and 27?
It is: 9
What is the greatest common factor to 18 and 45?
The GCF is 9.
What are the Greatest common factor and Least common multiple of 18 and 45?
The LCM of 18 and 45 is 90, and their GCF is 9.
