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      Question

      In each of the following questions, one number in the

      series does not follow the pattern of the others. Identify that wrong number in the series. 10, 20, 18, 36, 35, 68, 66
      A 20 Correct Answer Incorrect Answer
      B 66 Correct Answer Incorrect Answer
      C 35 Correct Answer Incorrect Answer
      D 18 Correct Answer Incorrect Answer
      E None of these Correct Answer Incorrect Answer

      Solution

      Observe the pattern using alternate multiplication and subtraction: 10 × 2 = 20 20 − 2 = 18 18 × 2 = 36 36 − 2 = 34 (but the series has 35) 34 × 2 = 68 68 − 2 = 66 So the term at that position should be 34, not 35. Therefore, 35 is the wrong number.

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