Complete the series: 2, 6, 12, 20, 30, ?
- A. 36
- B. 40
- C. 42
- D. 46
Explanation
The differences between consecutive terms are 4, 6, 8, 10 — increasing by 2 each time. The next difference is 12, so the missing term is 30 + 12 = 42.
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