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9th Class Mathematics Number System and its Operations Question Bank Number Systems

  • question_answer
    The sum of the digits of a number is subtracted from the number, the resulting number is always divisible by which of the following numbers?

    A)  \[2\]                            

    B)  \[5\]                

    C)  \[8\]                

    D)         \[9\]    

    Correct Answer: D

    Solution :

    The resulting number is always divisible by 9. e.g., Consider 47. Sum of its digits is \[4+7=11\]So,\[47-11=36\]which is exactly divisible by 9


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