Multiple choice

Find the wrong term in sequence : 1, 5, 5, 9, 7, 11, 11, 15, 12, 17

  1. 11

  2. 12

  3. 17

  4. 15

  5. 9

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B Correct answer
Explanation

The sequence is formed by repeating the difference pattern of +4, +0, +4, -2. Following this pattern, after 15, we should subtract 2 to get 13, and then add 4 to get 17. Therefore, 12 is the wrong term and should be replaced by 13.