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The GCF of 21 and 45 is 3.
One way to determine the greatest common factor is to find all the factors of the numbers and compare them.
The factors of 21 are 1, 3, 7, and 21.
The factors of 45 are 1, 3, 5, 9, 15, and 45.
The common factors are 1 and 3. Therefore, the greatest common factor is 3.
The greatest common factor can also be calculated by identifying the common prime factors and multiplying them together.
The prime factors of 21 are 3 and 7.
The prime factors of 45 are 3, 3, and 5.
The prime factors in common are a single 3, so the greatest common factor is 3.
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The greatest common factor (GCF) refers to a factor that is COMMON to two or more numbers. You have only one number in the question! The greatest factor of any number is itself.
What is the greatest common factor of 45 and 115?
The greatest common factor is 5.
What is the greatest common factor of 26 and 45?
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What is the greatest common factor of 90 30 45?
The greatest common factor of 90 , 30 , 45 = 15
Greatest common factor of 27and 45?
The greatest common factor of the numbers 27 and 45 is 9.
