Correct Answer & Explanation
Option C
• The series is formed by two alternating sequences:
Odd positions: 3, 7, 11, 15
3 + 4 = 7
7 + 4 = 11
11 + 4 = 15 (Correct)
Even positions: 6, 9, 14, 18
6 + 3 = 9
9 + 4 = 13
13 + 5 = 18
• Instead of 14, the number should be 13 to follow the +3, +4, +5 pattern.
• Therefore, 14 is the wrong number.