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
140 28 11.2 6.72 5.576 5.376
(1) 5.576
(2) 11.2
(3) 140
(4) 28
(5) None of these
Question No : 2
36 18 16 27 54 135 405
(1) 36
(2) 18
(3) 16
(4) 405
(5) 54
Question No : 3
13 16 21 27 39 52 69
(1) 21
(2) 39
(3) 27
(4) 52
(5) 16
Question No : 4
12 39 164 500 1236 2567
(1) 164
(2) 500
(3) 1236
(4) 2567
(5) 39
Question No : 5
80640 10080 1440 240 44 12
(1) 12
(2) 10080
(3) 1440
(4) 44
(5) 240