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What is the greatest common factor of 9and18 and 21?

Updated: 10/17/2024

Wiki User

∙ 13y ago

Best Answer

The greatest common factor is 3:

Factors of 9: 1, 3, 9

Factors of 18: 1, 2, 3, 6, 9, 18

Factors of 21: 1, 3, 7, 21

The two common factors are 1 and 3 and the greatest of these two is 3.

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∙ 13y ago

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