Which of the following numbers will replace the question mark (?) in the given series?
115, 102, 107, 94, 99,?
Show answer & explanation
Correct answer: D
Explanation
The correct answer is option 4 i.e. 86.
115 - 13 = 102,
102 + 5 = 107,
107 - 13 = 94,
94 + 5 = 99,
99 - 13 = 86