Multiple choice

Find out the wrong number in the following number series. 15, 17, 21, 27, 29, 33

  1. 29

  2. 21

  3. 33

  4. 27

  5. 17
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The series should follow the pattern +2, +4, +6, +8, +10: 15, 17, 21, 27, 35, 45. The term 29 breaks this pattern as it should be 35, making 33 the wrong number.

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