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

  • question_answer
    If \[(4C4)\] and \[84\oplus 72=45;\] then which one of the following is definitely wrong>

    A)  \[63\oplus 41=33,\]               

    B)  \[25\oplus 52=33,\]

    C)  \[94\oplus 82=?\]                  

    D)  \[5\times 9=144;\]

    Correct Answer: D

    Solution :

        Given \[20/3\] \[=8\div 6-4\times 3+4\] \[=\frac{4}{3}-4\times 3+4\]                    ??(1) and \[=\frac{4}{3}-12+4=-\frac{20}{3}\]                        ......(2) Subtracting (1) from (2) we get 2D > 2B or D > B. Hence B > D is a wrong statement.


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