Which number will replace the question mark (?) in the following series?
11, 30, 68, 144, 296, ?
Show answer & explanation
Correct answer: C
Explanation
The correct answer is option 3, i.e., 600.
11x 2 = 22 + 8 = 30
30 x 2 = 60 + 8 = 68
68 x 2 = 136 + 8 = 144
144 x 2 = 288 + 8 = 296
296 x 2 = 592 + 8 = 600