Question

    178        168       148      ?     

    78       28 What should come in place of question mark (?) in the following number series?
    A 118 Correct Answer Incorrect Answer
    B 105 Correct Answer Incorrect Answer
    C 128 Correct Answer Incorrect Answer
    D 110 Correct Answer Incorrect Answer
    E 120 Correct Answer Incorrect Answer

    Solution

    178 – 10 = 168 168 – 20 = 148 148 – 30 =  118 118 – 40 = 78 78 – 50 = 28

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