The GCF of 60 and 72 is 12.
60 = 2*2*3*5 = 2^2 * 3 * 5
72 = 2*2*2*3*3 = 2^3 * 3^2
GCF = 2^2 * 3 = 4*3 = 12
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The highest common factor of the numbers 30, 60 and 72 is 6.
The greatest factor is 72 which is a factor of 72 (though not of 60).
The highest common factor of 36 and 72 is 36
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The GCF of 72 and 120 is 24.