1) 4, 8, 28, 80, 244, ? A) 428 B) 278 C) 728 D) 628 Answer: Option CExplanation:The terms of the given series are: 31+ 1,32-1, 33+ 1, 34-1, 35+1, ..... So, missing term =36 - 1 = 729 - 1 = 728 Hence the answer is c.