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SSC Sample Paper SSC CHSL (10+2) Sample Test Paper-17

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

    A) 5                                 

    B) 7

    C) 11                                

    D) 17

    Correct Answer: A

    Solution :

    Let four prime numbers are w, x, y, and z. \[\therefore \,\,\,\,uxy=385\]                         ?... (i) and \[xyz=1001\Rightarrow xyz=7\times 11\times 13\] \[\therefore \]  x and y are 7 and 11 \[\therefore \]   \[w=\frac{385}{7\times 11},\,\,\,\,w=\mathbf{5}\]


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