Fifteen is a composite number, its proper divisors being 1, 3 and 5.
There are fifteen players in a rugby football team.
... Hawkshead[?] Cumberland Pencil Museum[?], Keswick Dock Museum[?], Barrow-in-Furness[?] Kendal Museum[?] Museum of Lakeland Life[?], Kendal[?] Tullie House Museum, ...