Cogni33

Cogni33 is a high range pattern recognition test consisting of 33 numerical items that should be solved in the most logical and simplest way. There is no time limit, and answers should be carefully thought out. Discussion with others about solutions is not allowed. The items are not arranged in order of difficulty. To receive your score report, please send your solutions to dawid.skrzos@o2.pl. There is a fee of 10 EUR for scoring each submission, which you can pay via PayPal to dawid.skrzos@o2.pl (choose the option to send to a friend or family) or directly to my bank account (Dawid Skrzos, IBAN: PL93156000132016122130000003, SWIFT/BIC: GBGCPLPKXXX). Three attempts are allowed, however, only the first two attempts are considered official scores.

News!! All my tests are now free of charge if you submit your solutions before 01/01/2026. Proof of identity is required in that case. 

The test:

1) 1, 11, ?, 2334

2) 1/3, 2/7, 4, 1, ?

3) 368, 683683, ?

4) 1, 5, ?, 12141692

5) 584, 1318, ?, xx18

6) 5315, 6636, 3967, ?

7) 5824217413, +x-/???

8) 05, 6, 0003, D, 2, ?, ?

9) A, 13, ?, ?, S, ?, ?, 0.(4)

10) 123, 243, 435, ?, ?, 876

11) 1, ?, P, 27x73, ?, 444x444

12) ?, ??, ????, ?, ?, ??????, ???, ??

13) 39278, 76561, 88312, 16914, ?

14) 12255, 34493, 78219, ?, 2116997

15) 2222228, 33333, 4444, 5535, ?, ?

16) 1, ?, 4444, 55555555555, 7777777

17) 18276, 4/3, ?, 8/9, 16343, ?, ?, 6/13

18) 123456789, 451891368, 451981710, ?

19) ?, 024, 2048, 04, 4096, 9, ?, ?, 16384, ?

20) LL, ?, QRSTUVWX, YZNPRCF, ILORUXN

21) 1234567, 710131619222528, ?, 1623303744

22) 124356, 134526, 241356, ?, 345126, 345261

23) 232323, 696969, 207207, ?, 135135, 545454

24) ABCDEFGHI, ABCDEFGHI, LCFIIO, ?, XRQM

25) 9, ?, ?, 25, ?, ?, 36, ?, ?, 49, ?, ?, 8, ?, ?, 8, ?, ?, 100

26) 123456789, 152230123, 644522123, ?, 411352230

27) 1, 55555, 999999999, 4, 111, 77777777, ?, ?, 5555555

28) 1254793, 136479, ?, 1398547, 1452397, ?, 179325, 1796523

29) 123456, 23, ?, ?, ?, ?, 651234, 65, 234, 654123, ?, 1236, ?, ?, 36, 654321, ?, 32

30) 56677788888, 334444???????778, 122222???????33344445555566666677788

31) 1, 2, ?, 4, ?, ?, 34, ?, 234, 1234, 56, 345, ?, ?, 12345, 16, ?, 3456, ?, 23456, 123456

32) 1234, ><>, 1813129820, <>, ?, <, 458912142122242630323638394041424348495253545660

33) 0131010101310401010104013101, 0638510171822406710116063851, 0748512172733417721206173852, ?