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Why is 21 the greatest common factor in 21 and 63?

Updated: 8/19/2019

Wiki User

∙ 11y ago

Best Answer

Because 21 is a factor of 63. 21 is the greatest factor of 21. A larger number doesn't exist.

Wiki User

∙ 11y ago

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The Greatest Common Factor of 21, 63, 84: 21

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Why is 21 the greatest common factor in 21 and 63?

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