8 and 16, among others.
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The greatest common factor of the numbers 3, 4, 8 and 9 is 1.
The greatest common factor of the numbers 8 and 95 is 1.
The GCF of 64 and 88 is 8. 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 64 are 1, 2, 4, 8, 16, 32, and 64. The factors of 88 are 1, 2, 4, 8, 11, 22, 44, and 88. The common factors are 1, 2, 4, and 8. Therefore, the greatest common factor is 8.
You need at least two numbers to find a GCF. 8 and 12 have a GCF of 4.