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    Question

    Which of the four options will replace the question mark

    (?) in the following series? XF 11 , YI 15, ZL 19 , AO 23, ?
    A CQ 25 Correct Answer Incorrect Answer
    B BP 26 Correct Answer Incorrect Answer
    C CR 25 Correct Answer Incorrect Answer
    D BR 27 Correct Answer Incorrect Answer

    Solution

    First position: X to Y: +1 Y to Z: +1 Z to A: +1 A to  B : +1 Second position: F to I: +3 I to L: +3 L to O: +3 O to  R : +3 Third position: 11 to 15: +4 15 to 19: +4 19 to 23: +4 23 to  27 : +4 Thus, the missing term in the series will be  BR 27 . Thus, the correct option is (d).

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