28, 56, 711
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They are in descending order: 78 58 38 and 28
0.44, 0.5, 25, 38.
0.28, 2.8, 28, 208
The Least Common Multiple (LCM) for 28 49 and 84 is 588.The Greatest Common Factor (GCF) for 28 49 and 84 is 7.
You need at least two numbers to find a GCF.