Select the number from among the given options that can replace the question mark (?) in the following series.
543, 518, 495, 474, 455, ?
Show answer & explanation
Correct answer: D
Explanation
The correct answer is option 4 i.e. 438.
543 - 25 = 518
518 - 23 = 495
495 - 21 = 474
474 - 19 = 455
455 - 17 = 438