You want the only shared prime factor to be 7, and the unique prime factors to be 5 and 2.
Thus, one answer is 7x2 and 7x5
The number pair is 14 and 35 or 7 and 70.
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LCM = 70 GCF = 7
GCF: 7 LCM: 210
There are a whole lot of pairs. 2 and 35 is one pair.
The Greatest Common Factor (GCF) of 120, 70, and 45 is 5. The Least Common Multiple (LCM) of 120, 70, and 45 is 2,520.
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.