Question

    What should come in place of question mark ‘?’ in the following number series?

    3      15        60         180 

          360         ?
    A 360 Correct Answer Incorrect Answer
    B 320 Correct Answer Incorrect Answer
    C 380 Correct Answer Incorrect Answer
    D 300 Correct Answer Incorrect Answer
    E None of these Correct Answer Incorrect Answer

    Solution

    3 × 5 = 15 15 × 4 = 60 60 × 3 = 180 180 × 2 = 360 360 × 1 =  360

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