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More ways to get Braingle...

Tennis balls

Logic puzzles require you to think. You will have to be logical in your reasoning.

 

Puzzle ID:#152
Fun:*** (2.58)
Difficulty:** (1.93)
Category:Logic
Submitted By:jerry1***
Corrected By:phrebh

 

 

 



There are three boxes of tennis balls in a warehouse. They have all been mislabeled. One box is labeled yellow tennis balls, one is labeled white and yellow tennis balls and one is labeled white tennis balls. Take one can of tennis balls out of one box without looking into the box or into any other box. By just looking at the color of this one can of balls, can you correctly label each of the boxes?



Answer

Take a can of tennis balls from the box labeled `White and Yellow Tennis Balls`. Say that the ball is yellow. Take the `Yellow Tennis Balls` label and put it on that box. Remove the `White and Yellow Tennis Balls` label and put it on the box marked `White Tennis Balls`. It couldn't go on the box that had previously had the `Yellow Tennis Balls` label, because that would mean that the `White Tennis Balls` label couldn't be changed, and we have been told that all the boxes are mislabeled. Move the `White Tennis Balls` label to the unlabeled box. (The same logic would prevail if you started with any of the boxes.)
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