You are presented with three treasure chests, one containing gold coins, one containing silver coins and one containing a mixture of gold coins and silver coins. The three chests are labelled "Gold Coins", "Silver Coins" and "Gold and Silver Coins".
The problem is that all of the treasure chests have been labelled incorrectly.
By opening just one treasure chest how can you determine the contents of all three chests?
Answer at 9.00 on Monday