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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 both numbers have in common.
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 45 are 1, 3, 5, 9, 15, and 45.
The factors of 77 are 1, 7, 11, and 77.
The only common factor is 1. Therefore, the greatest common factor is 1.
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What is the greatest common factor of 77?
There is not a greatest common factor of a single number, such as 77, because there cannot be a greatest common factor without two or more numbers to compare. Common factors are factors that the numbers being compared have in common. The greatest common factor is the largest factor that all the numbers being compared have in common. Thus, since there are not two or more numbers to compare, there are neither common factors nor a greatest common factor. The factors of 77 are 1, 7, 11, and 77. The prime factors of 77 are 7 and 11. Examples: The greatest common factor of 63 and 77 is 7. The greatest common factor of 74 and 77 is 1. The greatest common factor of 77 and 121 is 11.
What is the greatest common factor of 55 and 77?
The greatest common factor of 55 and 77 is 11. The prime factorization of 55 is 5*11. The prime factorization of 77 is 7*11. The greatest common factor is 11.
What is the greatest common factor of 231 and 154?
The greatest common factor of 231 and 154 is 77.
What is the greatest common factor of 231 and 1001?
The GCF is: 77
What is the greatest common factor of 539 and 847?
The GCF is 77.
