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REY [17]
3 years ago
7

What is the greatest common factor of 21, 27, and 39?

Mathematics
2 answers:
egoroff_w [7]3 years ago
4 0
21 = 1*21, 3*7
27 = 1*27, 3*9
39 = 1*39, 3*13, 

From here can you see any common factors? 

Tanzania [10]3 years ago
3 0
21 = 3 x 7
27 = 3³
39 = 3 x 13

Greatest Common Factor = 3

-----------------------------------------------
Answer: 3
-----------------------------------------------
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