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What is the greatest common factor of 81 and 42?

Anonymous

∙ 13y ago

The GCF of 42 and 81 is 3.

The prime factorization of 42 is 2*3*7

The prime factorization of 81 is 3*3*3*3

Their only and greatest common factor is 3.

Wiki User

∙ 9y ago

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