Multiple choice general knowledge math & puzzles

9,12,11,14,13,?,15

  1. 12

  2. 16

  3. 10

  4. 17
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The series alternates between adding 3 and subtracting 1: 9+3=12, 12-1=11, 11+3=14, 14-1=13. Continuing: 13+3=16, 16-1=15. Option A (12) would break the pattern, C (10) is too low, and D (17) doesn't fit the alternating rule.

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