Correct Answer - Option 1 : 245
Given:
100, 221, 77, 245, 50, 275
Calculation:
Considering the above series, the logic should be
100 + (11)2 = 221
221 - (12)2 = 77
77 + (13)2 = 246
246 - (14)2 = 50
50 + (15)2 = 275
∴ The wrong term in this series is 245.