1. 1, 2, 5, 7, 11, _,17
2. 1, 8, 27, _______ ,125
3. 6, 12, 21, 33,_______
4. 2, 20, ,110, 182
5. 81, 9, 64, ___?__ ,49, 7
6. 15, 20, 30, __?_ ,65
7. 18, 30, 48, 72, 96,
8. 12, 32, 72, 152, ? ,632
9. 1, 2, 3, 5, 7,______?_____,13
10. 3, 8, 22, 63, 185, _____ ?
11. 4, 5, 7, ? , 19
12. 27, 24, 30, 27, 33, ?
13. 4, 10, 22, 46,
14. 4, 1, -8, ? ,-20, 29, -32, 43
15. 2, -2, 7, 3, 17, ? ,32, 13
16. 9, 15, 23, 33, ? ___
17. 12, 8, 14, 6, ? ,4
*18. 16, 12, 64, 16, ? ,20, 256
19. 2, 6, ? ,120, 720, 5040
20. 9, 6, 16, 10, 30, 18, ? ,34
21. 10, 18, 34, ? ,130, 258
22. 30, 23, 17, 12, ? ,5
23. 285, 253, 221, 189, ?
24. 8, 10, 14, 18, ? ,34, 50, 66
25. 29, 36, 44, 53, ?
26. 10, 22, 27, ? ,44, 56, 61
27. 2, 10, 60, 420, 3360, ?
28. 5, 8, 12, 17, 23, ? _,38
29. 4, 9, 20, 43, 90, ?
30. 5, 9, 16, 29, 54, 103, ?