Directions (Qs.1 to 5): In each of the following questions a number series is given. In each series only one number is wrong that does not follow the given pattern of the series. Find out that wrong number.
Question No : 1
13 20 39 77 145 248
(1) 20
(2) 39
(3) 145
(4) 77
(5) 248
Question No : 2
1 3 9 31 128 651 3913
(1) 651
(2) 128
(3) 31
(4) 9
(5) 3
Question No : 3
128 192 480 1680 7562 41580
(1) 192
(2) 480
(3) 1680
(4) 41580
(5) 7562
Question No : 4
250 286 350 450 594 793 1046
(1) 350
(2) 450
(3) 793
(4) 1046
(5) 594
Question No : 5
1680 1168 1119 903 868 814
(1) 1680
(2) 1119
(3) 903
(4) 868
(5) 814