2. Sample Papers
  3. Railways

Railways Sample Paper RRB (Assistant Loco Pilot & Technician) Sample Test Paper-14

  • question_answer
    If \[{{(20)}^{3}}\] is subtracted from the square of a number, the answer so obtained is 4321. What is the number?

    A)  110                             

    B)  111

    C)  112                 

    D)       113

    Correct Answer: B

    Solution :

     Let the number be \[x\]. According to the questions,  \[{{x}^{2\,\,}}\,\,{{(20)}^{2}}=4321\] \[\Rightarrow \]\[{{x}^{2}}\,\,\,8000=4321\] \[\Rightarrow \]\[{{x}^{2\,}}-8000+4321=12321\] \[\Rightarrow \] \[x=\sqrt{12321}=111\]


You need to login to perform this action.
You will be redirected in 3 sec spinner