Global Optical Illusions Knowledge Test
Since 2013, we have been measuring the global knowledge about optical illusions through the online quiz game.
The results are based on 521971 answers to questions in category optical illusions, given by players from 142 countries.
This test has questions in the following languages:
Italian language, German language, English language, Polish language, Russian language, Ukrainian language and Polish language.
Results by country
Results by gender
40.6% | /157664 |
23.6% | /140104 |
Origin of answers
Answers distribution by gender:
gender
men
52%
157664
women
48%
140104
Answers distribution by language:
language
Italian language
0%
251
German language
0%
4540
English language
5%
27975
Polish language
56%
295263
Russian language
0%
2947
Ukrainian language
0%
975
Polish language
36%
190020
Answers distribution by country:
country
Poland
95%
496875
the United States
2%
11082
Germany
0%
5176
India
0%
4432
the United Kingdom
0%
4227
Ukraine
0%
1531
Russia
0%
1435
Australia
0%
1098
Canada
0%
893
Austria
0%
850
Quiz size
Number of active questions per language:
language
Italian language
1%
1
German language
17%
11
English language
23%
15
Polish language
21%
14
Russian language
9%
6
Ukrainian language
9%
6
Polish language
17%
11