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The GCF is 1.
Since 3 is a factor of 42, it is automatically the GCF.
The greatest common factor between 9 and 3 is 3. 3 x 1 = 3 and 3 x 3 = 9.
No.
30
It is 12
42
30 and all its multiples
$1.40
6, 12, 18 and so on.
A triangular prism.
6 and 12