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The GCF is 2.
It is: 2
The GCF is 1.
The GCF is 4.
The GCF is 38.
GCF of 64 and 152 is 8.64=1,2,4,8,16,32,64152=1,2,4,8,19,38,76,152
The GCF is 3.
The GCF is 19.
The GCF is 46.
The GCF is 23.