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natka813 [3]
3 years ago
15

What is the GFC of 21, 35, and 49?

Mathematics
1 answer:
Gnoma [55]3 years ago
7 0
The greatest common factor of 21, 35, and 49 is: 7

Since 21 is the lowest number we are solving up to, so no other factors can be given after that.
Factors of 21: 1, 3, 7, 21
Factors of 35: 1, 5, 7
Factors of 49, 1, 7

The common factors between the three numbers are 1 and 7, but we are looking for the greatest common factor, not the common ones. It either has to be 1 or 7, and 7 is obviously the highest, making it the greatest common factor.
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