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    Question

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

    351      261      181      111      51   

      ?
    A 1 Correct Answer Incorrect Answer
    B 11 Correct Answer Incorrect Answer
    C 21 Correct Answer Incorrect Answer
    D 31 Correct Answer Incorrect Answer

    Solution

    351 – 90 = 261 261 – 80 = 181 181 – 70 = 111 111 – 60 = 51 51 – 50 = 1

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