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    Question

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

    11,13,17,19,23,25

    ?
    A 27 Correct Answer Incorrect Answer
    B 29 Correct Answer Incorrect Answer
    C 31 Correct Answer Incorrect Answer
    D 33 Correct Answer Incorrect Answer

    Solution

    Alternate numbers +6   11+6=17, 17+6=23   13+6=19, 19+6=25,25+6=31

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