1.

1). 212). 273). 22.64). 27.3

Answer»

Let the seventh number is X.

Sum of NINE numbers = 18 × 9 = 162

X + (X + 5) + (X + 6) = 162 – 42 – (46/3 × 3) = 74

⇒ 3X + 11 = 74

⇒ X = 21

∴ 9th number = 21 + 6 = 27



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