0
Anonymous
280 and 287
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The GCF is 50.
The GCF is 20.
50
Find a number in that range that you know is a multiple of 7, like 210 or 280. Add 7 to it. 210 and 217 have a GCF of 7. 280 and 286 have a GCF of 7.
240 and 300