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Logic problems. The solution to these problems does not usually require a lot of math, but will take some thinking until you find the right approach.
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Difficulty: 1 of 5 Latest: Keys and boxes
There are four keys of different colors: red, yellow, green, and blue. Each key opens a different box: red, yellow, green, and blue. Here are some clues.

1. No key opens a box of the same color.
2. The red key does not open the yellow box.
3. The green key opens the blue box.

Which key opens which box?
(No Solution Yet, 1 Comments) Submitted on 2014-07-31 by Math Man   
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