10 + 9  + 8 + 7 + 6 + 5 = 45 / 6 = 7.5
 5 + 8  + 9 + 6 + 3     = 31 / 5 = 6.2
 6 + 7  + 8 + 9 + 10    = 40 / 5 = 8
10 + 9  + 7 + 8 + 6     = 40 / 5 = 8
9  + 7  + 8 + 10        = 34 / 4 = 8.5
6  + 10 + 9             = 25 / 3 = 8.33
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215 / 28 = 7.6785...               46.53 / 6 = 7.755