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

  • question_answer
    What value should be given to * so that the number \[653*47\]is divisible by 11?

    A)  \[1\]                                    

    B)  \[6\]                    

    C)  \[2\]                    

    D)                         \[9\]                    

    Correct Answer: A

    Solution :

    Adding the digits at odd places of the given number \[653*\text{ }47,\]we get 13. Now if the number is divisible by 11, the sum of digits at even places should also be 13, so that   \[13-13=0\]is divisible by 11.       We have \[7+*+5=13.\] \[\therefore \]   \[*=13-12=1\]is the required value.


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