Which of the following numbers will replace the question mark (?) in the given series?
78, 112, 64, ?, 50, 140
Show answer & explanation
Correct answer: B
Explanation
The correct answer is option 2 i.e. 126.
78, 64, 50 ⇒ 78 - 14 = 64; 64 - 14 = 50
112, ? , 140 ⇒ 112 + 14 = 126; 126 + 14 = 140