Which of the following numbers will replace the question mark (?) in the given series?
31, 32, 36, ?, 61, 86
Show answer & explanation
Correct answer: C
Explanation
The correct answer is option 3 i.e. 45.
Given series: 31, 32, 36, ?, 61, 86
31 + (1)2 = 32; 32 + (2)2 = 36; 36 + (3)2 = 45; 45 + (4)2 = 61; 61 + (5)2 = 86