A series is given with one term missing. Select the correct alternative from the given ones that will complete the series.
10, 41, 165, 661, ?, 10581, 42325
Show answer & explanation
Correct answer: A
Explanation
10 × 4 + 1 = 41
41 × 4 + 1 = 165
165 × 4 + 1 = 661
661 × 4 + 1 = 2645
2645 × 4 + 1 = 10581
10581 × 4 + 1 = 42325
Therefore, ? = 2645