Question

    Find the wrong number in the series

    5, 15, 30, 135, 405, 1215,

    3645
    A 3645 Correct Answer Incorrect Answer
    B 1215 Correct Answer Incorrect Answer
    C 405 Correct Answer Incorrect Answer
    D 30 Correct Answer Incorrect Answer

    Solution

    Multiply each term by 3 to obtain the next term. Hence, 30 is a wrong number.

    Practice Next