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      Question

      (? × 3)2 - 85 = 115 × 5 +

      69 What will come in the place of question mark (?) in the given expression?
      A 18 Correct Answer Incorrect Answer
      B 12 Correct Answer Incorrect Answer
      C 9 Correct Answer Incorrect Answer
      D 20 Correct Answer Incorrect Answer
      E None of these Correct Answer Incorrect Answer

      Solution

      ATQ, (? X 3)2 - 85 = 115 X 5 + 69 (? X 3)2 = 85 + 575 + 69 (? X 3)2 = 729 ? X 3 = ±27 ? = 27 ÷ 3 = ±9

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