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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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