find the gcf of 12 and 45

what is the gcf of 12 and 45
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1 Answer

12 = 2 * 2 * 3

45 = 3 * 3 * 5

The GCF is made of those parts that appear in both 12 and 45.

A 3 appears in both 12 and 45.  Nothing else appears in both 12 and 45.

Answer:  3 is the GCF of 12 and 45.
by Level 13 User (103k points)

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