Answer: 12
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 108 are 1, 2, 3, 4, 6, 9, 12, 18, 27, 36, 54, and 108.
The factors of 132 are 1, 2, 3, 4, 6, 11, 12, 22, 33, 44, 66, and 132.
The common factors are 1, 2, 3, 4, 6, and 12. Therefore, the greatest common factor is 12.
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The greatest common factor of 132 and 225 is 3.
The greatest common factor of 105 and 132 is 3.
The greatest common factor of 132 and 144 is 12.
The greatest common factor of 132 , 286 = 22
The greatest common factor of 84 132 and 156 is 12.