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 521654 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% | /157662 |
23.6% | /140104 |
Origin of answers
Answers distribution by gender:
gender
men
52%
157662
women
48%
140104
Answers distribution by language:
language
Italian language
0%
251
German language
0%
4531
English language
5%
27904
Polish language
56%
295128
Russian language
0%
2940
Ukrainian language
0%
974
Polish language
36%
189926
Answers distribution by country:
country
Poland
95%
496665
the United States
2%
11042
Germany
0%
5170
India
0%
4430
the United Kingdom
0%
4225
Ukraine
0%
1530
Russia
0%
1431
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