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    Question

    1, 1.5, 3, 7.5, 22.5, 75,

    315 In the following number series, only one number is wrong. Find out the wrong number.
    A 3 Correct Answer Incorrect Answer
    B 1.5 Correct Answer Incorrect Answer
    C 75 Correct Answer Incorrect Answer
    D 22.5 Correct Answer Incorrect Answer
    E 315 Correct Answer Incorrect Answer

    Solution

    The pattern of the series is: 1 × 1.5 = 1.5 1.5 × 2 = 3 3 × 2.5 = 7.5 7.5 × 3 = 22.5 22.5 × 3.5 = 78.75 78.75 × 4 = 315

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