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Answer: 7:30 pm on Wednesday


Using a table

 


 


 


Using the total change in time
The clock time in Melbourne is 11 hours later than in London, and he spent 11 hours on the plane.

So Fred arrives a total of 32 hours (one complete day and 8 hours) ahead of the clock time in London when he left. So he arrived at 7:30pm on Wednesday.


This problem is taken from the UKMT Mathematical Challenges.
You can find more short problems, arranged by curriculum topic, in our short problems collection.