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Railways Sample Paper RRB (Assistant Loco Pilot) Sample Test Paper-7

  • question_answer
    Nitin's age was equal to square of some number last year and the following year it would be cube of a number. If again Nitin's age has to be equal to the cube of some number, then for how long he will have to wait?

    A)  10 years                      

    B)  3 8 years         

    C)         3 9 years            

    D)         64 years

    Correct Answer: B

    Solution :

    Clearly, we have to first find two numbers whose difference is 2 and of which the smaller one is a perfect square and the bigger one a perfect cube. Such numbers are 25 and 27. Thus, Nitin is now 26 years old. Since the next perfect cube after 27 is 64, So required time period \[=(64-26)\] years =38 years.


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