1, 2, 3 and 6
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The answer is 2.
The GCF of 42, 48, and 78 is 6.
6 * 8 = 48 6 * 7 = 42 The highest common factor is 8.
The GCF of 42, 30, 60 and 48 is 6.
Factors of 32: 1, 2, 4, 8, 16, 32.Factors of 42: 1, 2, 3, 6, 7, 14, 21, 42.Factors of 48: 1, 2, 3, 4, 6, 8, 12, 16, 24, 48.GCF (32, 42, 48) = 2