Which of the following numbers will replace the question mark (?) in the given series?
90, 211, 67, 236, ?
Show answer & explanation
Correct answer: C
Explanation
The correct answer is Option 3 i.e. 40
90, 211, 67, 236, ?
90 + (11)2 = 90 + 121 = 211
211 - (12)2 = 211 - 144 = 67
67 + (13)2 = 67 + 169 = 236
236 - (14)2 = 236 - 196 = 40
Hence, the correct answer is 40.