The GCF of 26, 42, and 78 is 2.
The factors of 26 are: 1, 2, 13, 26
The factors of 42 are: 1, 2, 3, 6, 7, 14, 21, 42
The factors of 78 are: 1, 2, 3, 6, 13, 26, 39, 78
The common factors are: 1, 2
The Greatest Common Factor (GCF) is: 2
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26 = 2 * 13; 42 = 2 * 3 * 7; the greatest common factor is 2
The greatest common factor of 42 and 66 is 6.6
The greatest common factor of 16 and 42 is 2.
Since 3 is a factor of 42, it is automatically the GCF.
The greatest common factor of the numbers 210 and 84 is 42.