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 Kingdom77
Australia18
the United States78
Poland8513
Brazil21
France41
the Netherlands32
Germany203
Switzerland21
Ukraine39
Spain34
Austria29
Russia94
Mexico19
Colombia24
India23
Italy1046
Belarus18