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Anonymous
Prime factorization of 45 = 3x3x5
Prime factorization of 60 = 2x2x3x5
Prime factorization of 160 = 2x2x2x2x2x5
Only common factors are 5 (and 1).
Therefore GCF = 5.
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The GCF is 5.
The GCF is 15.
The GCF is 20.
The GCF is 3.