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      Question

      Find the wrong number in the given number series.

      1, 3, 10, 21, 64, 129, 356, 777
      A 21 Correct Answer Incorrect Answer
      B 129 Correct Answer Incorrect Answer
      C 10 Correct Answer Incorrect Answer
      D 356 Correct Answer Incorrect Answer
      E None of these Correct Answer Incorrect Answer

      Solution

      Clearly the series pattern is:ย ย  x 2 + 1, x 3 + 1, x 2 + 1, x 3 + 1,..... So, 356 is wrong and must be replaced by (129 x 3 + 1) i.e. 388

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