2. Solved Papers
  3. Railways

Railways R.R.C. (Allahabad) Solved Paper 1st Shift Held on 1-12-2013

  • question_answer
    28. \[\frac{69842\times 69842-30158\times 30158}{69842-30158}=?\]

    A) 100000             

    B) 39684

    C) 69842              

    D) 30158

    Correct Answer: A

    Solution :

    \[\frac{69842\times 69842-30158\times 30158}{69842-30158}\] \[=\frac{{{(69842)}^{2}}-{{(30158)}^{2}}}{(69842-30158)}\] \[=\frac{(69842+30158)\,\,(69842-30158)}{(69842-30158)}\] \[=(69842+30158)\] \[=100000\]


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