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Foreign Puppy (Posted on 2003-10-31) Difficulty: 3 of 5
A man wishes to sell a puppy for $11. A customer wants to buy it but only has foreign currency. The exchange rate for the foreign currency is 11 round coins = $15, 11 square coins = $16, 11 triangular coins = $17.

How many of each coinage should the customer pay?

See The Solution Submitted by Ravi Raja    
Rating: 3.5000 (4 votes)

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Solution Quick solution | Comment 6 of 8 |
8 round coins @ $15/11 = $120/11, so you are $1/11 short; if you change a round coin for a square one you'll get $121/11=$11.
  Posted by Federico Kereki on 2003-11-02 20:34:21
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