0
Anonymous
There is no "best" estimate other than the exact answer since any other estimate can be improved with some effort.
3.2*5 = 16
3.5*4 = 14 so I would go for 15.
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3 + 5 = 8
469 is evenly divisible by: 1, 7, 67, 469.
469 is a composite number.
31.2667
469 = 67 x 7
6.7