CREATE TABLE table_55837 ("Home team" TEXT, "Home team score" TEXT, "Away team" TEXT, "Away team score" TEXT, "Venue" TEXT, "Crowd" FLOAT, "Date" TEXT)

What was home team North Melbourne's opponents score?
SELECT "Away team score" FROM table_55837 WHERE "Home team" = 'north melbourne'
SELECT "Away team score" FROM "table_55837" WHERE "Home team" = 'north melbourne'