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17 November, 06:15

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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  1. 17 November, 06:35
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    Yi left a factor of 63, that is 21.

    So the GCF will be 21
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