A series is given with one term missing. Select the correct alternative from the given ones that will complete the series.
28, 57, 115, 231, 463, 927, ?, 3711
Show answer & explanation
Correct answer: B
Explanation
28 × 2 + 1 = 57
57 × 2 + 1 = 115
115 × 2 + 1 = 231
231 × 2 + 1 = 463
463 × 2 + 1 = 927
927 × 2 + 1 = 1855
1855 × 2 + 1 = 3711
The difference in the series is (×2 + 1).
Therefore, ? =1855