Directions (Q. 1-5) : What will come in place of ‘?’ in the following series?
1. 258 130 66 34 18 ? (2)
(1) 12
(2) 10
(3) 4
(4) 6
(5) 9
2. 1 3 9 31 ? 651 (4)
(1) 177
(2) 184
(3) 196
(4) 129
(5) 258
3. 84 86 81 91 74 ? (2)
(1) 166
(2) 100
(3) 148
(4) 158
(5) None of these
4. 17 9 10 16.5 35 ? (1)
(1) 90
(2) 50
(3) 60
(4) 80
(5) 70
5. 420 84 21 7 ? 3.5 (1)
(1) 3.5
(2) 6
(3) 3
(4) 4
(5) 2.5