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SSC Sample Paper Mock Test-9 SSC CGL Tear-II Paper-1

  • question_answer
    There are four prime numbers written in ascending order. The product of first three is 385 and that of the last three is 1001. The first number is 

    A) 5

    B)  7          

    C)  11

    D)  17   

    Correct Answer: A

    Solution :

    Let the given prime numbers be a, b, c d. Then, \[\frac{abc}{bcd}=\frac{385}{1001}=\frac{5}{13}\]\[\Rightarrow \]\[\frac{a}{d}=\frac{5}{13}\]\[\Rightarrow \]\[a=5\]and \[d=13\] In given prime numbers, the first one is 5.


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