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The word GREATEST is a superlative and that means that there can be only one such number. It is not possible to have a greatest common factor pair. The greatest common factor is 4.

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8y ago
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15y ago

28 = 4 x 7
21 = 3 x 7

The GCF of 28 and 21 is 7.

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8y ago

The greatest common multiple of any set of integers is infinite.

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8y ago

The GCF is 4.

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Q: What is the greatest common factor pair of 28 and 32?
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