New RBI Grade B 2025 Notification will come Soon! Enroll Here

    Question

    Find the wrong number, in the given number series.

    1, 8, 27, 65, 125, 216
    A 8 Correct Answer Incorrect Answer
    B 65 Correct Answer Incorrect Answer
    C 216 Correct Answer Incorrect Answer
    D 125 Correct Answer Incorrect Answer
    E None of these Correct Answer Incorrect Answer

    Solution

    ATQ,

    These look like cubes of numbers:

    1 = 1³

    8 = 2³

    27 = 3³

    65 — not 4³ (which is 64)

    125 = 5³

    216 = 6³

    So the correct term after 27 should be:

    4³ = 64, not 65

    Wrong number: 65

    Correct number: 64

    Practice Next