Directions (1-5): In each of these questions a number series is given only one number is wrong in each series. You have to find out the wrong number.
1.10 15 24 35 54 75 100 (1)
(1) 35 (2) 75 (3) 24 (4) 15 (5) 54
2.1 3 4 7 11 18 27 47 (5)
(1) 4 (2) 11 (3) 18 (4) 7 (5) 27
3.3 2 3 6 12 37.5 115.5 (5)
(1) 37.5 (2) 3 (3) 6 (4) 2 (5) 12
4.2 8 32 148 765 4626 32431 (4)
(1) 765 (2) 148 (3) 8 (4) 32 (5) 4626
5.2 3 11 38 102 229 443 (2)
(1) 11 (2) 229 (3) 102 (4) 38 (5) 3