2. Sample Papers
  3. Railways
  4. Quantitative Aptitude
  5. Basic Calculations

Railways Quantitative Aptitude Basic Calculations Sample Paper Square Roots & Cube Roots Sample Test Paper-5

  • question_answer
    The smallest number by which 136 must be multiplied so that it becomes a perfect square is

    A)  2

    B)                     17

    C)  34

    D)  None of these

    Correct Answer: C

    Solution :

    [c] Resolve 136 into prime factors and make group of two of each prime factor \[136=2\times 2\times 2\times 17\] \[136=\left( 2\times 2 \right)\times 2\times 17\] We find that 2 and 17 doesn?t appear in group of two. So, 136 has to be multiplied with 34 to make it a perfect square.


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