30
2 x 15 = 30
3 x 10 = 30
5 x 6 = 30
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The GCF is 3.
The greatest common factor of 21 and 54 is 3. The greatest common factor is the highest number that divides exactly into two or more numbers. factors of 21: 1, 3, 7, 21 factors of 54: 1, 2, 3, 6, 9, 18, 27, 54 The greatest common factor of 21 and 54 is 3.
1 is the greatest common factor of 8 and 27. It is also the least. It is also the only.
The greatest common factor of 30 and 39 is 3.
The greatest common factor of 24 and 57 is 3.