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SSC Sample Paper SSC CGL - Sample Paper-14

  • question_answer
    The sum of all the 3-digit numbers is

    A) 98901              

    B) 494550

    C) 8991                            

    D) 899

    Correct Answer: B

    Solution :

    First 3 digit number = 100 Last 3 digit number = 999 Number of terms = 900 \[\therefore \]      \[S=\frac{n}{2}(a+l)\]             \[=\frac{900}{2}(100+999)\]             \[=450\times 1099\]             \[=494550\]


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