Answer:
The GCF of 40 and 63 can be obtained like this:
The factors of 40 are 40, 20, 10, 8, 5, 4, 2, 1.
The factors of 63 are 63, 21, 9, 7, 3, 1.
The common factors of 40 and 63 are 1, intersecting the two sets above.
Explanation:
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