Railways R.R.C. (Chennai) Solved Paper Held on 17-11-2013

  • question_answer Which of the following equations does not have a 5 as its solution?

    A) \[6a9=21\]                    

    B) a + 12 =17

    C) 5a = 35

    D) \[2a-(-3)=13\]

    Correct Answer: C

    Solution :

    6a - 9 = 21 \[\Rightarrow \,\,\,\,\,\,\,\,\,\,\,a=5\]      a+12 = 17 \[\Rightarrow \,\,\,\,\,\,\,\,\,\,\,a=5\]          5a = 35 \[\Rightarrow \,\,\,\,\,\,\,\,\,\,\,a=7\] and     2a - (- 3) = 13 \[\Rightarrow \,\,\,\,\,\,\,\,\,\,\,a=5\] Hence 5a = 35 does not have a = 5 as its solution.


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