What should come in place of the question mark (?) in the following series?
4, 10, ?, 82, 244, 730, 2188
Show answer & explanation
Correct answer: C
Explanation
The correct answer is option 3 i.e. 28.
Given series: 4, 10, ?, 82, 244, 730, 2188
(4 × 3) - 2 = 10
(10 × 3) - 2 = 28
(28 × 3) - 2 = 82
(82 × 3) - 2 = 244
(244 × 3) - 2 = 730