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    Question

    Find the missing number (?) in the given number series

    11, ? 220,   660,  1320, 

     1320 
    A 102 Correct Answer Incorrect Answer
    B 117 Correct Answer Incorrect Answer
    C 55 Correct Answer Incorrect Answer
    D 155 Correct Answer Incorrect Answer
    E None of these Correct Answer Incorrect Answer

    Solution

    11, ? 220,   660,  1320,   1320  11 × 5 = 55, 55 × 4 = 220, 220 × 3 = 660, 660 × 2 = 1320 1320 × 1=1320

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