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      Question

      A polygon has 104 diagonals, the number of sides of the

      polygon is? 
      A 16 Correct Answer Incorrect Answer
      B 22 Correct Answer Incorrect Answer
      C 18 Correct Answer Incorrect Answer
      D 11 Correct Answer Incorrect Answer

      Solution

      The number of diagonal of N sided polygon = N(N-3)/2 = 104 or N(N - 3) = 208 So by options , N = 16

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