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

  • question_answer
    If N divided by 5 leaves a remainder of 3, then one's digit of N must be _____.

    A)  Either 3 or 6   

    B)  Either 3 or 8   

    C)  Either 8 or 1   

    D)  Either 8 or 6   

    Correct Answer: B

    Solution :

    N leaves remainder 3 when divided by 5. \[\Rightarrow (N-3)\] is divisible by 5. \[\Rightarrow \] One's digit of \[N-3\] is either 0 or 5. \[\Rightarrow \] One's digit of \[N\] is either 3 or 8.


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