Directions (1-5): What should come in place of question mark (?) in the following number series ?
1. 36, 20, ?, 8, 6, 5 (2)
(1) 10 (2) 12 (3) 14 (4) 16 (5) None of these
2.668, 656, 632, 584, ?, 296 (3)
(1) 392 (2) 438 (3) 488 (4) 536 (5) None of these
3.1, 121, 441, 961, 1681, ? (5)
(1) 2701 (2) 2511 (3) 2611 (4) 2801 (5) None of these
4. 9, 49, 201, 1009, ?, 20209, 80841 (4)
(1) 4054 (2) 4049 (3) 4050 (4) 4041 (5) None of these
5. 31, 35, 44, 60, 85, ? (1)
(1) 121 (2) 111 (3) 109 (4) 97 (5) None of these