Select the number from among the given options that can replace the question mark (?) in the following series.
18, 34, 66, 130,?
Show answer & explanation
Correct answer: D
Explanation
The correct answer is option 4 i.e. 258.
Given series: 18, 34, 66, 130,?
18 × 2 - 2 = 34; 34 × 2 - 2 = 66; 66 × 2 - 2 = 130; 130 × 2 - 2 = 258