8th Class Mathematics Playing with Numbers Question Bank Playing with Numbers

  • question_answer
    Find the value of A, B and C respectively. (i) \[\underline{\begin{align}   & \underline{\begin{align}   & \underline{\begin{align}   & \text{         A   8   3} \\  & \text{      }\!\!\times\!\!\text{       C   9  } \\ \end{align}} \\  & \text{      A  0  4  A} \\  & \text{+1  5  B  B  0} \\ \end{align}} \\  & \text{  C  C  A  0  A} \\ \end{align}}\](ii) \[\underline{\begin{align}   & \underline{\begin{align}   & \underline{\begin{align}   & \text{      4   3   A   4} \\  & \text{      }\!\!\times\!\!\text{         3   A  } \\ \end{align}} \\  & \text{    B  7  C  7  6} \\  & \text{+ B  C  0  C  2  0} \\ \end{align}} \\  & \text{    B  4  7  6  9  6} \\ \end{align}}\]

    A)
    (i) (ii)
    2, 6, 7 9, 5, 2
                   

    B)
    (i) (ii)
    6, 7, 2 4, 3, 1
                   

    C)
    (i) (ii)
    7, 5, 2 9, 2, 5
                   

    D)
    (i) (ii)
    7, 6, 2 4, 1, 2

    Correct Answer: D

    Solution :

    (i) \[\underline{\begin{align}   & \underline{\begin{align}   & \underline{\begin{align}   & \text{                   }\text{  8  9} \\  & \text{                    }\!\!\times\!\!\text{   }\text{  9     } \\ \end{align}} \\  & \text{               }\text{  0  4  } \\  & \text{      +  1   5  }\text{  }\text{  0} \\ \end{align}} \\  & \text{           }\text{ }\text{ }\text{   0  } \\ \end{align}}\] (ii) \[\underline{\begin{align}   & \underline{\begin{align}   & \underline{\begin{align}   & \text{         4   3    4    }\text{   4} \\  & \text{             }\!\!\times\!\!\text{     3     4    } \\ \end{align}} \\  & \text{         }\text{   7   }\text{   7    6} \\  & \text{+ }\text{  }\text{   0   }\text{   2   0} \\ \end{align}} \\  & \text{    }\text{   4    7    6    9   6} \\ \end{align}}\]


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