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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 527666 answers to questions in category optical illusions, given by players from 143 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

men
 40.7% /157929
women
 23.7% /140268

Origin of answers

Answers distribution by gender:

gender
men
52%
157929
women
48%
140268

Answers distribution by language:

language
Italian language
0%
288
German language
0%
4747
English language
5%
28432
Polish language
56%
298175
Russian language
0%
3054
Ukrainian language
0%
991
Polish language
36%
191979

Answers distribution by country:

country
flagPoland
94%
94%
500873
flagthe United States
2%
2%
11418
flagGermany
1%
1%
5873
flagIndia
0%
0%
4463
flagthe United Kingdom
0%
0%
4382
flagUkraine
0%
0%
1548
flagRussia
0%
0%
1492
flagAustralia
0%
0%
1116
flagCanada
0%
0%
911
flagAustria
0%
0%
896

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

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