Answer:
2
Explanation:
The prime factorization of 56 is: 2 x 2 x 2 x 7. The prime factors and multiplicities 28 and 56 have in common are: 2 x 2 x 7. 2 x 2 x 7 is the gcf of 28 and 56. gcf(28,56) = 28.
(28×2=56)
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