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    Question

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

    5, 18, 39, ?, 105,

    150
    A 22 Correct Answer Incorrect Answer
    B 56 Correct Answer Incorrect Answer
    C 85 Correct Answer Incorrect Answer
    D 68 Correct Answer Incorrect Answer

    Solution

    ATQ, 22 + 1 = 5 42 + 2 = 18 62 + 3 = 39 82 + 4 = 68 102 + 5 = 105 122 + 6 = 150

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