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We have 10 glasses sitting in a row. The first five are filled with water and the other five are empty. What would be the minimum number of glasses needed to move so that the full and empty glasses alternate?

Question #24080. Asked by Tim.

Gnomon
Answer has 2 votes
Gnomon
23 year member
1331 replies

Answer has 2 votes.
Two.

Take the 2nd full glass, pour its contents into the 2nd empty glass and replace the glass.

Take the 4th full glass, pour its contents into the 4th empty glass and replace the glass.

Nov 08 2002, 8:45 AM
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