Look at this series: 12, 11, 13, 12, 14, 13, … What number should come next?
- 15
- 10
- 16
- 13
Explanation
- The series alternates between subtracting 1 and adding 2:
- 12 → 11 (subtract 1)
- 11 → 13 (add 2)
- 13 → 12 (subtract 1)
- 12 → 14 (add 2)
- 14 → 13 (subtract 1)
Following this alternating pattern, the next step should be adding 2 to 13:
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