Question

    Find the missing number in the following number series:

    7      8       ?       13      

    17        22      28
    A 12 Correct Answer Incorrect Answer
    B 11 Correct Answer Incorrect Answer
    C 10 Correct Answer Incorrect Answer
    D 9 Correct Answer Incorrect Answer
    E None of these Correct Answer Incorrect Answer

    Solution

    7 + 1 = 8 8 + 2 =  10 10 + 3 = 13 13 + 4 = 17 17 + 5 = 22 22 + 6 = 28

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