Alphanumerical Sequence Collection
A collection of alphanumeric sequence problems. Untimed.
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ALPHANUM SEQUENCES (25 problems)
Find the element(s) that complete the sequences. Be sure to separate multiple elements with commas. Use of a calculator is allowed and recommended.
1. 1, 2, 4, ?, 11, 16, 22 *
1 point
2. 19, 18, 16, 13, ?, 4, -2 *
1 point
3. 1, 3, 3, 6, ?, 24, 432, 456 *
1 point
4. AC, BD, CF, ?, EM, FR *
1 point
5. Z, O, ?, S, H, W, L, A *
1 point
6. 1, 2, 4, 8, 1, ?, 3, 2, 6, 4 *
1 point
7.  14, 5, 28, 10, 42, ?, ?, 11, 70, 7 *
1 point
8. 65, 126, 237, 448, ?, 16610 *
1 point
9. 27898, 27898, ?, 82798, 97288, 88279 *
1 point
10. O, BBE, Q, BHI, S, ? *
1 point
11. 145, 541, 25161, 686, 686, 366436, 1372, ?, ?, ? *
1 point
12. 12C, D63, ?, F0621, 6273G *
1 point
13. 27, 414, 722, ?, 833, 1242, 2863 *
1 point
14. 24, 68, 34, 56, 43, 21, ?, ?, 58, 14, 67, 89, 82, 40, 88 *
1 point
15. 29, 51, 25, 90, 49, 51, ?, ?, 53, 92, 51 *
1 point
16. 10, 100, 10001, 000010, 00001000000, ? *
1 point
17. 1, 5, 6, 7, 1, 1, ?, ?, 1, 3, 7, 8, 8, 2, ?, ?, 3 *
1 point
18. AX, BL, DC, ?, KT, PT, VW *
1 point
19. 16, 23, 31, 36, ?, 46, 50, ?, 69 *
1 point
20. 121, 543, 101412, 797115, ?, 111110813713515 *
1 point
21. (7)685, 6(6)28, 03(8)3, 856(5), (6)301, 9(6)06, ?, ?, (0)761, ?, ?, 580(3) *
1 point
22. 27615, 16209, 07916, 21407, ?, 04004 *
1 point
23. 10: ()14, (28), 17(), ()35, (82), 23(), ?, ?, 11(), ()131, (298), ? *
1 point
24. 153, 208, 354, 428, ?, 635, 725, 813, 863, 928, 1087 *
1 point
25. 123456, 54321, 21605, ?, 2532, 26, 8 *
1 point
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