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%

Brazil

10%

73%

10%

the United Kingdom

10%

72%

10%

Poland

71%

11%

8435

France

17%

70%

10%

the Netherlands

19%

67%

Switzerland

19%

66%

14%

the United States

13%

65%

10%

Ukraine

13%

63%

10%

Germany

15%

61%

14%

153

Spain

58%

11%

17%

Russia

17%

57%

12%

Mexico

15%

57%

15%

Austria

22%

55%

18%

Colombia

20%

54%

16%

Belarus

27%

50%

16%

Italy

22%

49%

14%

1001

India

19%

47%

19%

14%

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