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Anonymous
LCM = 70
GCF = 7
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gcf = 1 lcm = 840
The LCM is 70.
Gcf: 35 lcm: 420
105 and 5, respectively.
If that's really 4270 and 84, the GCF is 14 and the LCM is 25620. If that's 42, 70 and 84, the GCF is 14 and the LCM is 420.