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    Question

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

    following series? 1.5, 3.5, 9.5, 27.5, 81.5, 243.5, ?
    A 730.5 Correct Answer Incorrect Answer
    B 719.5 Correct Answer Incorrect Answer
    C 729.5 Correct Answer Incorrect Answer
    D 709.5 Correct Answer Incorrect Answer
    E 739.5 Correct Answer Incorrect Answer

    Solution

    1.5, 3.5, 9.5, 27.5, 81.5, 243.5, ? 1.5 × 3 – 1 = 3.5 3.5 × 3 – 1 = 9.5 9.5 × 3 – 1 = 27.5 27.5 × 3 – 1 = 81.5 81.5 × 3 – 1 = 243.5 243.5 × 3 – 1 = 729.5

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