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7th Class Mathematics Integers Question Bank Integer

  • question_answer
    In a magic square each row, column and diagonal have the same sum, then the values  of A and B respectively are
    1 -10 0
    A -3 -2
    -6 4 B

    A)  \[-7,-4\]                      

    B)  \[-4,-7\]        

    C)                     \[-4,-6\]          

    D)         \[-6,-4\]                                  

    Correct Answer: B

    Solution :

    We have,  \[1+(-10)+0=-9\] \[\therefore \] \[1+A+(-6)=-9\,\,\Rightarrow \,\,\,A-5=-9\] \[\Rightarrow \]            \[A=-9+5=-4\] Also     \[1+(-3)+B=-9\] \[\Rightarrow \]  \[B-2=-9\,\,\Rightarrow \,\,B=-9+2=-7\]


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