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Method of prime factorization: Expressing each number as the product of prime numbers.

P.F. of 16 = 2x2x2x2

P.F. of 42 = 2x3x7

G.C.F.(16, 42) = 2

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The GCF is 2.

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9y ago
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Q: What is the greatest common factor of 16and 42?
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