Number Series · Question 30 · Hard
Find the next number in the series: 1, 2, 6, 21, 88, 445, ?
- 2225
- 2680
- 2670
- 2676
Answer and explanation
Answer: D. 2676
Explanation: Each term is (previous × k) + k for k = 1, 2, 3, ...: 1×1+1 = 2, 2×2+2 = 6, 6×3+3 = 21, 21×4+4 = 88, 88×5+5 = 445, so the next is 445×6 + 6 = 2676.
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