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      Question

      Which of the following numbers will replace the question

      mark (?) in the given series? 54, 53, 57, 48, 64, 39, ?
      A 72 Correct Answer Incorrect Answer
      B 77 Correct Answer Incorrect Answer
      C 73 Correct Answer Incorrect Answer
      D 75 Correct Answer Incorrect Answer

      Solution

      54 – 1Β² = 53 53 + 2Β² = 57 57 - 3Β² = 48 48 + 4Β² = 64 64 - 5Β² = 39 39 + 6Β² = 75

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