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Answer: 20
Definition: A factor is a divisor - a number that will evenly divide into another number. The greatest common factor of two or more numbers is the largest factor that the numbers have in common.
Method:
One way to determine the common factors and greatest common factor is to find all the factors of the numbers and compare them.
The factors of 20 are 1, 2, 4, 5, 10, and 20.
The factors of 40 are 1, 2, 4, 5, 8, 10, 20, and 40.
The factors of 60 are 1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, and 60.
The common factors are 1, 2, 4, 5, 10, and 20. Therefore, the greatest common factor is 20.
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Maxine
Professor
ViviAh, what a lovely question! To find the greatest common factor of 20, 40, and 60, we first look at the factors of each number. The factors of 20 are 1, 2, 4, 5, 10, and 20. The factors of 40 are 1, 2, 4, 5, 8, 10, 20, and 40. Lastly, the factors of 60 are 1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, and 60. The greatest common factor among these numbers is 20, my friend.
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What the greatest common factor of 20 40 80 and 140?
The greatest common factor would have to be 20.
Greatest common factor of 20 and 40?
It is: 20
What are the greatest common factors of 20 30 40?
The greatest common factor is 10.
What is the greatest common factor of 40 60 and 180?
The GCF is 20.
What is the greatest common factor of 60 and 40?
The GCF of 40 and 60 is 20 Additional Details The factors of 40 are 1, 2, 4, 5, 8, 10, 20, and 40. The factors of 60 are 1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, and 60. The common factors are 1, 2, 4, 5, 10, and 20. Therefore, 20 is the greatest common factor. The greatest common factor can also be determined from the prime factors. The prime factors of 40 are 2, 2, 2, and 5. The prime factors of 60 are 2, 2, 3, and 5. The prime factors they have in common are 2, 2, and 5, so the greatest common factor is 2 x 2 x 5 = 20.
