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 States65
Poland8492
Brazil21
France40
the Netherlands32
Germany192
Switzerland21
Ukraine38
Spain34
Austria29
Mexico19
Russia92
Colombia24
Italy1037
Belarus18
India21