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The GCF of 45 and 54 is 6.

The factors of 42 are 1,2,3,6, and 7 because these are the only numbers that will divide evenly into 42 with no remainder.

The factors of 54 are 1,2,3,6, and 9.

The common factors of these two numbers are 1,2,3, and 6 because they appear in both lists of factors.

Of these common factors, 6 is the largest number.

Therefore the greatest common factor for 42 and 54 is 6.

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βˆ™ 7y ago
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Kamryn Madden

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βˆ™ 7y ago

The greatest common factor (GCF) refers to a factor that is COMMON to two or more numbers. You have only one number in the question! The greatest factor of any number is itself.

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Q: What is the greatest common factor of 42 and 54?
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