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the two numbers between 20 and 30 which have GCF of 4 are 24 & 28.

Prime factorization of :

24 = 2 x 2 x 2 x 3

28 = 2 x 2.......... x 7

==============

GCF=2 x 2

GCF=4

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Q: What two numbers between 20 and 30 have GCF of 4?
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