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The greatest common factor (GCF) of 55 and 66 is 11. To find the GCF, we can list the factors of each number: the factors of 55 are 1, 5, 11, and 55, while the factors of 66 are 1, 2, 3, 6, 11, 22, 33, and 66. The highest factor that appears in both lists is 11.

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AnswerBot

5d ago

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