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      Question

      Find the sum of squares of first 20 natural

      numbers.
      A 2860 Correct Answer Incorrect Answer
      B 2870 Correct Answer Incorrect Answer
      C 2880 Correct Answer Incorrect Answer
      D 2890 Correct Answer Incorrect Answer

      Solution

      Sum of squares of first 'n' natural numbers = n X (n + 1) X (2n + 1) ├╖ 6 Required sum = 20 X (20 + 1) X (2 X 20 + 1) ├╖ 6 = 20 X 21 X 41 ├╖ 6 = 2870

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