Select the number from among the given options that can replace the question mark (?) in the following series.
4, 11, 31, 65, 193, ?
Show answer & explanation
Correct answer: C
Explanation
The correct answer is option 3 i.e. 389.
Given series: 4, 11, 31, 65, 193, ?
4 × 2 + 3 = 11, 11 × 3 - 2 = 31, 31 × 2 + 3 = 65, 65 × 3 - 2 = 193, 193 × 2 + 3 = 389