SSC Quantitative Aptitude Number System and its Operations Question Bank Numbers and Their Principles (II)

  • question_answer
    The sum of the squares to two natural consecutive odd numbers is 394. The sum of the numbers is

    A) 24

    B) 32

    C) 40

    D) 28

    Correct Answer: D

    Solution :

    [d] Let the two consecutive odd numbers be x and \[(x+2).\] Then, according to the question, \[{{(x)}^{2}}+{{(x+2)}^{2}}=394\] \[\Rightarrow \]   \[{{x}^{2}}+{{x}^{2}}+4+4x=394\] \[\Rightarrow \]   \[2{{x}^{2}}+4x=390\] \[\Rightarrow \]   \[{{x}^{2}}+2x=195\] \[\Rightarrow \]   \[x\,\,(x+2)=195=13\times 15\] \[\Rightarrow \]               \[x=13\] Thus, sum of the numbers             \[=x+(x+2)\]             \[=13+15\]             \[=28\]


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