CREATE TABLE table_73231 ("Game" FLOAT, "Date" TEXT, "Opponent" TEXT, "Result" TEXT, "Wildcats points" FLOAT, "Opponents" FLOAT, "Record" TEXT)

What game number did the Wildcats play Purdue?
SELECT "Game" FROM table_73231 WHERE "Opponent" = 'Purdue'
SELECT "Game" FROM "table_73231" WHERE "Opponent" = 'Purdue'