Solution #68: All Wet
Here are two solutions:
I.
- Fill the 3-cup container and pour it into the 5-cup container.
- Fill the 3-cup container again and from it fill the 5-cup container,
leaving 1 cup of water in the 3-cup container.
- Empty the 5-cup container and pour the remaining cup from the 3-cup
container into it.
- Now fill the 3-cup container and add it to the 1 cup that is
already in the 5-cup container.
The result is the desired 4 cups.
II.
- Fill the 5-cup container.
- Fill up the 3-cup container using the water in the 5-cup container,
leaving 2 cups in the 5-cup container.
- Empty the 3-cup container.
- Pour the remaining 2 cups from the 5-cup container into the 3-cup container.
- Fill the 5-cup container again.
- Pour water from the 5-cup container into the 3-cup container (that already
has 2 cups of water in it) until the 3-cup container is full.
Now, 4 cups of water remain in the 5-cup container.
Source: Fixx, James F
Categories: Number sense, Process, Favorite
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