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Discussion :: Numbers

  1. (112 + 122 + 132 + ... + 202) = ?the smallest whole number in place of * will be:

  2. A.

    385

    B.

    2485

    C.

    2870

    D.

    3255

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    Answer : Option B

    Explanation :

    (112+ 122 + 132 + ... + 202) = (12 + 22 + 32 + ... + 202) - (12 + 22 + 32 + ... + 102)

     

     (20×21×41610×11×216)

     

     = (2870 - 385)

     

     = 2485.

     


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