9+12+16+22=59
59/4=14.75
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lcd(22, 12, 16, 9) = 1584 22 = 2 x 11 12 = 2^2 x 3 16 = 2^4 9 = 3^2 lcd = 2^4 x 3^2 x 11 = 1584
5+7+9+12+12 = 45 and 45/5 = 9 which is the mean average
The LCM of 8, 9, 12, and 16 is 144.
10
12 + 22 + 32 + 42 + 52 = 1 + 4 + 9 + 16 + 25 = 55