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8th Class Mathematics Related to Competitive Exam Question Bank Missing Character

  • question_answer
    DIRECTIONS: In each of the following questions, a matrix of certain characters is given. These characters follows a certain trend, row-wise or column wise Find out this trend and choose the missing character from the given alternatives.
    5 9 8 7
    8 6 9 10
    7 13 ? 19
    5 7 8 9

    A) 9                                 

    B) 10

    C) 12                               

    D) 15

    Correct Answer: D

    Solution :

    In the first column, \[(5+8+7)\div 4=5\]. In the second column, \[(9+6+13)\div 4=7\]. In the fourth column, \[(7+10+19)\div 4=9\]. Let the missing number be x. Then, in the third column, we have: \[(8+9+x)\div 4=8\]\[\Rightarrow \]\[17+x=32\]\[\Rightarrow \]\[x=15\].


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