4 and 60, respectively.
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The GCF and LCM of 10 and 20 are 10 and 20, respectively.
LCM 12 and 20 is 60.
GCF: 12 LCM: 72 GCM: infinite
The numbers are: 12 and 72
The LCM of 12 and 14 is 84. The LCM of a pair of numbers is their product divided by their GCF. The GCF of 12 and 14 can be no larger than their difference, which is 2. Since 2 goes evenly into 12 and 14, it is, in fact, the GCF. To find the LCM, then, multiple 12 and 14 and divide by 2 to get 84.