Which of the following numbers will replace the question mark(?) in the given series?
286, 231, ?, 151, 126, 111
Show answer & explanation
Correct answer: B
Explanation
The correct answer is option 2 i.e. 186.
286 - 55 = 231; 231 - 45 = 186; 186 - 35 = 151; 151 - 25 = 126; 126 - 15 = 111