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Method 1:

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List the factors of each number.

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Factors of 39: 3, 13, 39

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Factors of 50: 2, 5, 10, 25, 50

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There are  no common prime factors.Two numbers aiways have 1 as a common \ \ factor.So, the GCF is 1, and the numbers are relativety prime.

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Method 2:

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Write the prime factorization of each  number.

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39 =  1 × 3 × 13.

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50 =  1 × 2 × 5 × 5.

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There are  no common prime factors.Two numbers aiways have 1 as a common \ \ factor.So, the GCF is 1, and the numbers are relativety prime.\"\"

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There are  no common prime factors.Two numbers aiways have 1 as a common \ \ factor.So, the GCF is 1, and the numbers are relativety prime.

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