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
the United Kingdom71
Australia18
the United States70
Poland8500
Brazil21
France41
the Netherlands32
Germany197
Switzerland21
Ukraine38
Spain34
Austria29
Russia94
Mexico19
Colombia24
Italy1042
Belarus18
India21