Correct Answer - Option 3 : 185
Concept Used:
Double difference between consecutive terms is 2.
Calculations:
Series = 79, 96, 115, 136, 159, 185, 211
96 - 79 = 17
115 - 96 = 19
136 - 115 = 21
159 - 136 = 23
184 - 159 = 25
211 - 184 = 27
⇒ Wrong number = 185
∴ The wrong number in given series is 185.