4
3*4 = 12
5*4 = 20
6*4 = 24
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The GCF is 12.
The factors of 20 are 1, 2, 4, 5, 10, and 20.The factors of 24 are 1, 2, 3, 4, 6, 8, 12, and 24.The factors of 12 are 1, 2, 3, 4, 6, and 12.The factors that are common to 20, 24, and 12 are 1, 2, and 4.The greatest one is 4 .
The GCF is 12.
The GCF is 3.
The GCF is 3.