CREATE TABLE table_25540 ("No." FLOAT, "#" FLOAT, "Title" TEXT, "Directed by" TEXT, "Written by" TEXT, "U.S. viewers  ( million ) " TEXT, "Rank  ( week ) " TEXT, "Original air date" TEXT)

How many # were written by david hoselton?
SELECT MAX("#") FROM table_25540 WHERE "Written by" = 'David Hoselton'
SELECT MAX("#") FROM "table_25540" WHERE "Written by" = 'David Hoselton'