Sum = 42 Count = 6 Mean = Sum/Count = 42/6 = 7
9 + 7 = 16 9 - 7 = 2
10, 9, 8, 7, 6 or 11, 9, 8, 7, 5 etc
20
the sum of -2 and 6 and 7 is (-2+6+7)
Sum = 42 Count = 6 Mean = Sum/Count = 42/6 = 7
9+9+8+8+7+6=47. I do it this way: (9+9)+(8+8)+(7+6).
7(7 + 9)
6 plus 7
Sum = 24 Count = 4 Mean = Sum/Count = 24/4 = 6
6 + 7 + 8 + 9 + 10 + 11 = 51
4*4=16,1+6=7 5*5=25,2+5=7 6*6=36,3+6=9 7*7=49,4+9=13 8*8=64,6+4=10 9*9=81,8+1=9 so 9 square is 81 sum of these two digit is 9. 9 square is answer.
9 + 7 = 16 9 - 7 = 2
10, 9, 8, 7, 6 or 11, 9, 8, 7, 5 etc
20
the sum of -2 and 6 and 7 is (-2+6+7)
42