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8th Class Mathematics Related to Competitive Exam Question Bank Mathematical Operations

  • question_answer
    If  \[\Delta =\]\[p\square qOr,\]\[p\phi q\square r\] then\[p\phi q\times r\]

    A) 12                               

    B) 18

    C) 25                               

    D) 16

    Correct Answer: D

    Solution :

        The rule is: \[\ne \] \[\ne \] \[=14\times 10+42\div 2-8=14\times 10+21-8\] \[=140+21-8=161-8=153.\]


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