Hardest Series Teasers
Series teasers are where you try to complete the sequence of a series of letters, numbers or objects.
These brain teasers have been voted as the most difficult. Only teasers with at least 20 votes are shown. Good luck solving them!
|
Title |
Popularity |
Difficulty |
Submitted |
|
301 |
Eggs 2 |
|
|
09/04/06 |
by mathmama |
302 |
6, 24, 60, 120, 210, 336, 504, ? |
|
|
12/29/05 |
by kiss |
303 |
Order In The States |
|
|
05/31/05 |
by DennysGirl |
304 |
2520, 1260, 840, 630, 504, 420, 360, 315, ?, ? |
|
|
05/09/06 |
by Desired |
305 |
Fifths |
|
|
01/28/06 |
by Question_Mark |
306 |
Quid Pro Quo? |
|
|
07/14/02 |
by mad-ade |
307 |
1, 4, 25, 676, ?? |
|
|
06/11/02 |
by QtistLilShorTy |
308 |
10,4,3,11,15... |
|
|
09/21/01 |
by Michelle |
309 |
Random Patterns |
|
|
06/27/08 |
by AndrewWalker |
310 |
2, 5, 12, 31, 86.... |
|
|
04/26/02 |
by cathalmccabe |
311 |
2, 6, 15, 28, ?, 78 |
|
|
08/11/03 |
by hari |
312 |
2, 8, 26, 80, .... |
|
|
05/24/02 |
by QtistLilShorTy |
313 |
Letters For Numbers II |
|
|
12/14/05 |
by NomadShadow |
314 |
Letters and Numbers Oh My |
|
|
07/12/05 |
by trickster2005 |
315 |
N, W, H, O, I.... |
|
|
07/15/02 |
by peppermintwist |
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