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The work that Yi did to find the greatest common factor of 42 and 63 is shown below. Factors of 42: 1, 2, 3, 6, 7, 14, 21, 42 Factors of 63: 1, 7, 9, 63 The greatest common factor is 7. What is Yi’s error?

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Answer:

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Step-by-step explanation:

The error is that the factors of 3 and 21 are missing from the list for 63

Factors of 42 : 1, 2, 3, 6, 7, 14, 21, 42

Factors of 63 : 1, 3, 7, 9, 21, 63

common factors are : 1, 3, 7, 21

greatest common factor = 21

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Answer:

A. Yi did not list all the factors of 63

Step-by-step explanation:

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