10th Class Mathematics Real Numbers Question Bank Real Numbers

  • question_answer
    A boy was asked to multiply a given number by (8/17). Instead, he divided the given number by (8/17) and got the result 225 more than what he should have got if he had multiplied the number by (8/17). The given number was _____.

    A) 8                                 

    B) 17                   

    C)  64                  

    D)         136

    Correct Answer: D

    Solution :

    Let the number be x. Then, according to question.             \[\frac{x}{8/17}=225+x\times \frac{8}{17}\Rightarrow \frac{17x}{8}-\frac{8x}{17}=225\] \[\Rightarrow \]  \[225x=8\times 17\times 225\Rightarrow x=136\]

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