Multiple choice

Which number is wrong in the given series? 5, 18, 7, 14, 10, 12

  1. 14

  2. 10

  3. 18

  4. 7
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The series alternates between two patterns: odd positions increase by 2 (5→7→9→11) and even positions decrease by 4 (18→14→10→6). Position 5 should be 9, but it's 10, making 10 the wrong number. 14 and 18 correctly follow the even-position decreasing pattern.

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