CREATE TABLE table_23540 ("Starting price" TEXT, "Number" FLOAT, "Name" TEXT, "Age" FLOAT, "Weight  ( st ,  lb ) " TEXT, "Jockey" TEXT, "Trainer" TEXT, "Owner" TEXT, "Colours" TEXT)

What's the number of the horse weighting 10-5?
SELECT MIN("Number") FROM table_23540 WHERE "Weight (st, lb)" = '10-5'
SELECT MIN("Number") FROM "table_23540" WHERE "Weight (st, lb)" = '10-5'