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

    Question

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

    20

    910?2971.5
    A 21 Correct Answer Incorrect Answer
    B 25 Correct Answer Incorrect Answer
    C 19 Correct Answer Incorrect Answer
    D 14 Correct Answer Incorrect Answer
    E 17 Correct Answer Incorrect Answer

    Solution

    20 × 0.5 – 1 = 9 9 × 1 + 1 = 10 10 × 1.5 – 1 = 14 14 × 2 + 1 = 29 29 × 2.5 – 1 = 71.5

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