What's the name of this letter?

omega

sigma

delta

lambda

Sigma is a commonly used symbol of addition.

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Answers by country

Greece

100%

Estonia

96%

Australia

77%

11%

the United Kingdom

74%

Poland

71%

11%

8472

France

17%

70%

10%

Brazil

15%

70%

10%

the United States

12%

67%

10%

the Netherlands

19%

67%

Switzerland

19%

66%

14%

Germany

14%

65%

12%

181

Ukraine

13%

63%

10%

Spain

58%

11%

17%

Austria

20%

58%

17%

Mexico

15%

57%

15%

Russia

18%

56%

11%

Colombia

20%

54%

16%

Italy

21%

51%

14%

1029

Belarus

27%

50%

16%

India

19%

47%

19%

14%

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