0
Anonymous
10
Prime factorization of:
30 = 2 ............... x 3 x 5
60 = 2 x 2 x ............ x 5
80 = 2 x 2 x 2 x 2..... x 5
=================
GCF=2......................x 5
GCF=2 x 5 = 10
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