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      Question

      100, 125, 143, 169, 198, 230,

      265 In the following number series, only one number is wrong. Find out the wrong number.
      A 198 Correct Answer Incorrect Answer
      B 230 Correct Answer Incorrect Answer
      C 265 Correct Answer Incorrect Answer
      D 143 Correct Answer Incorrect Answer
      E 125 Correct Answer Incorrect Answer

      Solution

      The pattern of the series is: 100 + 20 = 120 120 + 23 = 143 143 + 26 = 169 169 + 29 = 198 198 + 32 = 230 230 + 35 = 265 The pattern for the differences is: 20 + 3 = 23 23 + 3 = 26 26 + 3 = 29 29 + 3 = 32 32 + 3 = 35 Hence, the wrong number is 125.

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