Number Sequence Test – Hard
Next follows a number sequences aptitude test with 21 of the hardest number sequences on the web! Can you solve them all? What are the missing numbers in the number sequences shown below? Good luck!
| 1. | 15 | 29 | 56 | 108 | 208 | … |
| 386 | 401 | 416 | 438 | |
| 2. | 13 | -21 | 34 | -55 | 89 | … |
| -96 | 104 | -123 | -144 | |
| 3. | 52 | 56 | 48 | 64 | 32 | … |
| 84 | 112 | 96 | 94 | |
| 4. | 1 | 3 | 7 | 11 | 13 | … |
| 17 | 15 | 19 | 21 | |
| 5. | 230 | 460 | 46 | 92 | 9.2 | … |
| 18.4 | 18 | 18.2 | 20.4 | |
| 6. | 3 | 12 | 24 | 33 | 66 | … |
| 75 | 74 | 86 | 82 | |
| 7. | 3 | 5 | 7 | 11 | 13 | … |
| 14 | 15 | 16 | 17 | |
| 8. | 16 | 16 | 24 | 36 | 54 | … |
| 86 | 76 | 81 | 72 | |
| 9. | 68 | 36 | 20 | 12 | 8 | … |
| 4 | 5 | 3 | 6 | |
| 10. | 18 | 6 | 24 | 8 | 28 | … |
| 9 | 9 1/3 | 10 | 8 | |
| 11. | 99 | 18 | 36 | 9 | 18 | … |
| 36 | 27 | 9 | 3 | |
| 12. | 3 | 8 | 23 | 68 | 203 | … |
| 271 | 248 | 608 | 606 | |
| 13. | 144 | 73 | 14 | 8 | 236 | … |
| 118 | 119 | 120 | 96 | |
| 14. | 10 | 45 | 15 | 38 | 20 | … |
| 25 | 30 | 31 | 33 | |
| 15. | 1 | 10 | 37 | 82 | 145 | … |
| 207 | 226 | 232 | 255 | |
| 16. | -2 | 1 | 6 | 13 | 22 | … |
| 29 | 33 | 36 | 42 | |
| 17. | 34 | -21 | 13 | -8 | 5 | … |
| 1 | 0 | -3 | -4 | |
| 18. | 1 | 0 | 1 | -1 | 2 | … |
| -2 | -3 | 0 | 1 | |
| 19. | 108 | 56 | 29 | 15 | 8 | … |
| 3 | 4 | 5 | 6 | |
| 20. | 1 | 8 | 27 | 64 | 125 | … |
| 189 | 196 | 216 | 225 | |
| 21. | -2 | 3 | 27 | 69 | 129 | … |
| 178 | 207 | 268 | 312 | |
