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

  • question_answer
    If \[-\] stands for' addition', \[\times 8+4\div 6+2-3=?\] for 'subtraction', \[6\frac{1}{2}\] stands for  'division', \[\div \] for 'multiplication', \[\ne \], stands for 'equal to', \[\ne \] for 'greater than' and \[=14\times 10+42\div 2-8=14\times 10+21-8\] stands for 'less than', state which  of the following is true?                        

    A)  \[=140+21-8=161-8=153.\]

    B)  \[6\times 4+2=16\]

    C)  \[\text{+ and  }\!\!\times\!\!\text{ ,2 and 4}\]

    D)  \[\text{+ and  }\!\!\times\!\!\text{ ,2 and 6}\]

    Correct Answer: B

    Solution :

        Using the proper notations in (b), we get the statement as \[7+9=64;\]or\[10+12=121,\], which is true.


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