Multiple choice

Find the wrong number in the following number series. 23, 26, 24, 29, 25, 28

  1. 23

  2. 26

  3. 24

  4. 25

  5. 29

Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

Pattern: next term = (previous term + next difference). Differences alternate between +3 and -2. 23+3=26, 26-2=24, 24+3=27 (not 29), 27-2=25, 25+3=28. The number 29 violates this alternating pattern - it should be 27. Option E correctly identifies 29 as wrong.