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 72 degrees (Posted on 2004-09-29)
You have an empty 3-liter container, a full 5-liter container with 50 degrees water, and a full 6-liter container with 90 degrees water.

Can you manage to get some 72 degrees water?

 See The Solution Submitted by Federico Kereki Rating: 3.6667 (6 votes)

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 could it be...? | Comment 1 of 9

If the room temperature is 72 degrees, wait for all the water to become that temperature.

If the room temperature is over 72 degrees, wait for the 50-degree water to get to 72. If the room temperature is under 72, wait for the 90-degree water to get to 72.

In the latter instances, the 72-degree temperature of the water will be temporary, but then, so will be the temperature of any 72-degree water that you get by any method.

 Posted by Charlie on 2004-09-29 09:11:35

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