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The GCF is: 4
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The GCF is: 8 The LCM is: 144
The LCM of 15 and 20 is 60. The GCF is 5.
The gcf of 16 and 20 is 4. The lcm of 16 and 20 is 80
4 and 40 8 and 20
20 and 100.GCF is 20, and LCM is 100.