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7th Class Mathematics Algebraic Expressions Question Bank Algebraic Expressions

  • question_answer
    In a two digit number, the units digit is n and tens digit is\[(n-1)\]. What is the value of the number? (Where\[n\le 9\]).

    A) \[kn-1\]                        

    B)  \[2n+3\]

    C) \[3+n\]          

    D)  \[11n-10\]

    Correct Answer: D

    Solution :

    Value of number \[=10\times (n-1)\] tens place + unit place \[n=\text{10 }n-10+n=11n-10\]


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