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The greatest common factor of 21 and 99 is 3.

21's factors are 1,3,and 7

99's factors are 1,3,9,11 33 (there may be more factors of 99).

The highest factor that both number have in common are 3.

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โˆ™ 2016-03-15 11:37:28
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Q: What is the greatest common factor of 21 and 99?
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