Gift of Gems
Stage: 4 Challenge Level: 
In this problem you are only given enough information to find the
values of rubies, saphires and diamonds relative to the price of a
pearl.
Try writing down what each jeweller has after he has made his gift.
These four collections all have equal value. Use that to find other
statements you can make about a number of one kind of gem matching
for value a number of another kind of gem.