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What is the greatest common factor of 21 and 77 and 84?

Anonymous

∙ 12y ago

Updated: 11/4/2022

The GCF of 21, 77, and 84 is 7.

First you have to find the lowest common factor, that is able to be divided by all the numbers.

E.g. 7

*21/7=3

*77/7=11

*84/7=12

3 and 11 are prime numbers and can therefore not be any divided further. Therefore the answer is 7.

Wiki User

∙ 9y ago

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More answers

the number is 4

Wiki User

∙ 12y ago

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