CREATE TABLE table_20400 ("Player" TEXT, "Matches" FLOAT, "Overs" TEXT, "Maidens" FLOAT, "Runs" FLOAT, "Wickets" FLOAT, "Average" TEXT, "Economy" TEXT, "5w" FLOAT, "10w" FLOAT, "Best Bowling" TEXT)

What is the highest number of maidens when the bowling best was 1/13?
SELECT MAX("Maidens") FROM table_20400 WHERE "Best Bowling" = '1/13'
SELECT MAX("Maidens") FROM "table_20400" WHERE "Best Bowling" = '1/13'