Which of the following options will replace the question mark (?) in the given series?
57, 63, 71,?, 93, 107
Show answer & explanation
Correct answer: A
Explanation
The correct answer is option 1 i.e. 81.
57 + 6 = 63; 63 + 8 = 71; 71 + 10 = 81; 81 + 12 = 93; 93 + 14 = 107