New Enroll in RBI Grade B New Batch - Starts on May 21

    Question

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

    following series? 3.5, 9.5, 27.5, 81.5, 243.5, 729.5, ?
    A 2157.5 Correct Answer Incorrect Answer
    B 2180.5 Correct Answer Incorrect Answer
    C 2187.5 Correct Answer Incorrect Answer
    D 2087.5 Correct Answer Incorrect Answer
    E 2147.5 Correct Answer Incorrect Answer

    Solution

    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 = 729.5 729.5 × 3 – 1 = 2187.5

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