Directions (1 – 5): In each of these questions a number series is given in each series only one number is wrong. Find out the wrong number.
1.5531 5506 5425 5304 5135 4910 4621 (1)
(1) 5531 (2) 5425 (3) 4621 (4) 5135 (5) 5506
2.6 7 9 13 26 37 69 (2)
(1) 7 (2) 26 (3) 69 (4) 37 (5) 9
3.1 3 10 36 152 760 4632 (4)
(1) 3 (2) 36 (3) 4632 (4) 760 (5) 152
4.4 3 9 34 96 219 435 (4)
(1) 4 (2) 9 (3) 34 (4) 435 (5) 219
5.157.5 45 15 6 3 2 1 (1)
(1) 1 (2) 2 (3) 6 (4) 157.5 (5) 45