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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 \[\underline{<}\] 9).

    A)  \[kn-1\]                        

    B)  \[2n+3\]

    C)  \[3+n\]            

    D)  \[11n-10~\]

    Correct Answer: D

    Solution :

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


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