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The Four-Stone Ring

Math brain teasers require computations to solve.

 

Puzzle ID:#8395
Fun:*** (2.76)
Difficulty:*** (2.51)
Category:Math
Submitted By:skaven*en****
Corrected By:Dave

 

 

 



While Christmas shopping, I chose a gold ring set with stones for my mother.

A ring set with 2 rubies and a diamond would have cost £3,000. One set with 4 amethysts and a diamond would come to £2,000. And 3 emeralds, 1 amethyst and a diamond would be £1,400.

Being a thoughtful son, I chose a ring that would have sentimental value. As my mother called her children Ellen, David, Richard and Andy, I have chosen a ring with one of each stone, to represent her children's names.

How much will my ring containing 1 emerald, 1 diamond, 1 ruby and 1 amethyst cost me?

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