The GCF is 12.
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The GCF is 2.
The GCF is 9.
It is 12*(5 - 3).
The common factors of 21 and 36 are 1 and 3
The common factors of 36 and 38 are 1 and 2. first find all factors of 38 and 36: The factors of 36 are 1, 2, 3, 4, 6, 9, 12, and 36 The factors of 38 are 1, 2, 19, and 38 now see what they have in common 1 and 2 so the common factors of 38 and 36 are 1 and 2.