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7th Class Mathematics Related to Competitive Exam Question Bank Mathematical Operations

  • question_answer
    DIRECTIONS: In each of the following questions, three statements of numbers following same rules are given. Find the rule and accordingly find the value of the number? If\[3\times 4=14;\]\[5\times 6=33;\]\[7\times 8=60,\]then\[8\times 9=\]?

    A) 77                   

    B) 89

    C) 98                               

    D) 79

    Correct Answer: A

    Solution :

        The rule is: the digits and ......... by 2, 3, 4, 5 etc. \[\therefore \]    \[8\times 9=(8.9)\]      


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