Find the GCF of each pair of monomial
13q^4 and 2p^2

-64n^4 and 24n^2

Find the GCF of each pair of products
-1 . 2 . 2 . X . X and 2 . 2 . 7 . X . X . X

For each set of numbers, determine which two numbers have a GCF greater than 1, and find that GCF
16, 21, 27

35, 54, 72