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 |
|
466 |
120, 60, 40, ... |
|
|
01/11/03 |
by warrior |
467 |
60, 30, 20, 15, ?, ? |
|
|
05/29/02 |
by mad-ade |
468 |
NT, NO, Z, O... |
|
|
08/06/02 |
by Canary05 |
469 |
What's Next 2 |
|
|
05/10/17 |
by fishmed |
470 |
5, 8, 11, 13, 15, 18, 21, 23, 25, ? |
|
|
05/05/06 |
by kiss |
471 |
Russia, Canada, China, United States |
|
|
06/01/04 |
by Jake |
472 |
4, 7, 11, 18, 29, 47, |
|
|
06/16/02 |
by mad-ade |
473 |
January - 20 |
|
|
10/20/01 |
by gokaran |
474 |
p,o,i,u |
|
|
08/12/02 |
by missie |
475 |
The Word of Site |
|
|
10/03/02 |
by something |
476 |
Letters From the Louvre |
|
|
11/10/07 |
by Hrsemn4 |
477 |
Incorrect Math Series #1 |
|
|
03/20/15 |
by Hydra1234 |
478 |
Triples 2 |
|
|
12/27/05 |
by bigSWAFF_69_ |
479 |
-2, 4, -12, 48, -240, ... |
|
|
02/14/01 |
by jerry1 |
480 |
SS, CS, PA, ?? |
|
|
07/26/02 |
by missie |
Follow Braingle!