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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 78 are 1, 2, 3, 6, 13, 26, 39, and 78.
The factors of 90 are 1, 2, 3, 5, 6, 9, 10, 15, 18, 30, 45, and 90.
The common factors are 1, 2, 3, and 6. Therefore, the greatest common factor is 6.
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What is the greatest common factor of 78 42 90 and 66?
The GCF is 6.
What is the greatest common factor of 1925 and 90?
The greatest common factor of 1925 , 90 = 5
What is the greatest common factor of 24 90?
The greatest common factor of 24 , 90 = 6
What are the greatest common factor of 54 and 90?
The greatest common factor of 54 , 90 = 18
What is the greatest common factor of 39 and 90?
The greatest common factor of 90 and 39 is 3
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