Puzzles/Number sequences
< Puzzles
The task is to find the hidden principle that constructs the list, and sometimes to continue the sequence, which is indicated by a question mark. Be aware: some sequences are infinite, some are finite. If you find a different solution than the given one please add it to the solution page. Creativity is encouraged!
Easy sequences
[edit | edit source]1 2 4 8 ? solution 1 2 4 7 ? solutions (more than one) 3 9 27 81 ? solution 2 3 5 8 13 21 ? solution 1 0 1 0 1 0 1 1 0 1 0 1 solution 2 3 6 7 1 9 4 5 8 solution 0 1 1 1 1 1 1 ... solution
Medium Sequences
[edit | edit source]1 3 7 61 ? solution 2 -2 0 2 -3 0 ? solution 1 4 1 5 9 ? solution
Hard Sequences
[edit | edit source] ??
85 90
29 67 0 solution
83 33 69 2
1 81 91 57 36
60 55 61 29 35 6
29 42 45 23 13 5 16
23 13 44 7 39 69 47 98
61 41 91 82 1 37 27 71 36
6 4 6 9 0 8 9 5 9 6
??
73 94
69 81 28 solution
56 3 43 54
33 98 49 91 8
7 31 44 27 57 6
26 45 71 38 61 65 88
25 36 7 97 76 91 87 86
83 55 98 1 5 10 1 15 96
3 9 3 4 4 3 0 7 5 6