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Railways Sample Paper RRB (Assistant Loco Pilot & Technician) Sample Test Paper-6

  • question_answer
    The average of 5 consecutive even numbers is 28. What is the sum of the largest number and the square of the smallest number?

    A)  603                

    B)  612

    C)  608                

    D)    605

    Correct Answer: C

    Solution :

     \[x+x+2+x+4+x+6+x+8=5\,\,\,\,\,28\]      \[\Rightarrow \] \[5x+20=140\]      \[\Rightarrow \] \[5x=120\] \[\Rightarrow \] \[x=\frac{120}{5}=24\]     \[\therefore \] Largest number      \[=x+8=24+8=32\]      \[\therefore \] Required sum \[=32+{{(24)}^{2}}\]      \[=32+576=608\]


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