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When finding the GCF of a set of numbers, firstly express each number as a product of its prime factors.

28 = 2 x 2 x 7

42 = 2 x 3 x 7

56 = 2 x 2 x 2 x 7

The factors that each number has in common are 2 and 7.

The Greatest Common Factor is therefore 2 x 7 = 14

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14y ago
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6y ago

The greatest common factor of 28, 42, and 56 is 14

The common factors are 1, 2, 7, and 14. Therefore, the greatest common factor is 14.

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AnushVarsan R

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Please send the sum cleary please send with full sum now

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6y 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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8y ago

The GCF is 14.

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6y ago

GCF(28, 42, 56) = 14.

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Q: What is the greatest common factor of 28 42 and 56?
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The Greatest Common Factor of 28, 42, 63: 7


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