Directions (1-15): In the following number series, a wrong number is given. Find out that wrong number.
1. 2, 11, 38, 197, 1172, 8227, 65806
(1) 11
(2) 38
(3) 197
(4) 1172
(5) 8227
2. 16, 19, 21, 30, 46, 71, 107
(1) 19
(2) 21
(3) 30
(4) 46
(5) 71
3. 7, 9, 16, 25, 41, 68, 107, 173
(1) 107
(2) 16
(3) 41
(4) 68
(5) 25
4. 4, 2, 3.5, 7.5, 26.25, 118.125
(1) 118.125
(2) 26.25
(3) 3.5
(4) 2
(5) 7.5
5. 16, 4, 2, 1.5, 1.75, 1.875
(1) 1.875
(2) 1.75
(3) 1.5
(4) 2
(5) 4
6. 150, 290, 560, 1120, 2140, 4230, 8400
(1) 2140
(2) 560
(3) 1120
(4) 4230
(5) 290
7. 10, 8, 13, 35, 135, 671, 4007
(1) 8
(2) 671
(3) 135
(4) 13
(5) 35
8. 80, 42, 24, 13.5, 8.75, 6.375, 5.1875
(1) 8.75
(2) 13.5
(3) 24
(4) 6.375
(5) 42
9. 125, 75, 45, 25, 16.2, 9.72, 5.832
(1) 25
(2) 45
(3) 9.72
(4) 16.2
(5) 75
10. 29, 37, 21, 43, 13, 53, 5
(1) 37
(2) 53
(3) 13
(4) 21
(5) 43
11. 13, 25, 40, 57, 79, 103, 130
(1) 25
(2) 40
(3) 57
(4) 79
(5) None of these
12. 850, 600, 550, 500, 475, 462.5, 456.25
(1) 600
(2) 550
(3) 500
(4) 462.5
(5) None of these
13. 2, 10, 18, 54, 162, 486, 1458
(1) 18
(2) 54
(3) 162
(4) 10
(5) None of these
14. 8, 12, 24, 46, 72, 108, 152
(1) 12
(2) 24
(3) 46
(4) 72
(5) None of these
15. 142, 119, 100, 83, 65, 59, 52
(1) 65
(2) 100
(3) 59
(4) 119
(5) None of these
