CREATE TABLE table_49529 ("Class" TEXT, "Wheel arrangement" TEXT, "Fleet number ( s ) " TEXT, "Manufacturer" TEXT, "Year made" TEXT, "Quantity made" TEXT, "Quantity preserved" TEXT)

Which fleet numbers has quanitity of 13?
SELECT "Fleet number(s)" FROM table_49529 WHERE "Quantity made" = '13'
SELECT "Fleet number(s)" FROM "table_49529" WHERE "Quantity made" = '13'