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Anonymous
The greatest common factor of 18, 30, and 42 is 2.
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The GCF is 6.
The GCF is 3.
The GCF of 16, 24, 30, and 42 is 2.
Thirty 42 - 18 = 24 24 / 2 = 12 18 + 12 = 30 42 - 12 = 30