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      Question

      What value should come in place of (?) question mark in

      the following number series. 7, 15, 31, 63, 127, ?
      A 255 Correct Answer Incorrect Answer
      B 239 Correct Answer Incorrect Answer
      C 264 Correct Answer Incorrect Answer
      D 200 Correct Answer Incorrect Answer
      E None of these Correct Answer Incorrect Answer

      Solution

      ATQ, Pattern ×2 +1 ⇒ 127×2+1=255.

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