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
omega
sigma
delta
lambda
answers
Greece24
Estonia30
Australia18
the United Kingdom67
Poland8484
Brazil21
the United States57
France40
the Netherlands31
Switzerland21
Germany185
Ukraine38
Spain34
Austria29
Mexico19
Russia92
Colombia24
Italy1036
Belarus18
India21