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 Kingdom68
Poland8485
the United States59
Brazil21
France40
the Netherlands31
Switzerland21
Germany186
Ukraine38
Spain34
Austria29
Mexico19
Russia92
Colombia24
Italy1036
Belarus18
India21