CREATE TABLE table_57842 ("Week" FLOAT, "Date" CLOB, "Opponent" CLOB, "Result" CLOB, "Attendance" CLOB)

What week number saw a w 31-16 result?
SELECT MIN("Week") FROM table_57842 WHERE "Result" = 'w 31-16'
SELECT MIN("Week") FROM "table_57842" WHERE "Result" = 'w 31-16'