We've checked the Reds' Barclays Premier League record and discovered it was only the eighth time this has happened since the inception of the division in 1992.
If Robin van Persie's effort that crossed the line had counted, it would have been only the second time Sir Alex's side had netted five times in the opening half in the Premier League.
How many of the seven matches can you recall?
Check out the answers here.
More trivia questions: Earliest away goals at OT | Goalkeepers meeting the Reds | Oldest scorers in Premier League | Internationals at Old Trafford | Old Trafford penalties | England's seven Reds | Alan Hardaker Trophy winners | Scored against United | United stars at European Championship | Goals for England | The name game | Non-appearance at finals