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    Question

    What will come in place of the question mark (?) in the

    following series? 50, 70, 110, 190, 310, ?
    A 655 Correct Answer Incorrect Answer
    B 457 Correct Answer Incorrect Answer
    C 772 Correct Answer Incorrect Answer
    D 470 Correct Answer Incorrect Answer
    E None of these Correct Answer Incorrect Answer

    Solution

    ATQ,

    Differences 70 - 50 = 20 110 - 70 = 40 190 - 110 = 80 310 - 190 = 120 Pattern in differences 20, 40, 80, 120 → next = 160 Add to last term 310 + 160 = 470

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