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Method 1:

Fill the 3-gallon jug.

Pour this into the 5-gallon jug.

Fill the 3-gallon jug again, and pour from it into the 5-gallon jug until it is full. This leaves 1 gallon in the 3-gallon jug.

Empty the 5-gallon jug, and then pour the gallon from the 3-gallon jug into it. Fill the 3-gallon jug, and pour it into the 5-gallon jug, thus making 4 gallons.

Method 2:

Fill the 5-gallon jug.

Pour this into the 3-gallon jug until it's full.

Empty the 3-gallon jug, and then pour the remaining two gallons into the 3-gallon jug.

Fill the 5-gallon jug, and then pour into the 3-gallon jug until it is full, leaving 4 gallons in the 5-gallon jug.

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10y ago
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Wiki User

13y ago

First fill the 7 gallon container to the top and empty it into the 5 gallon container. You then have 2 left in the 7 gallon container.

Second dump the 5 gallon and move the 2 left over from above from the 7 gallon container to the 5 gallon container. And fill the 7 gallon container to the top again. Empty the 7 container into the 5 container. You should now have a 7 gallon container with 4 gallons and a full 5 gallon container.

Third, dump the 5 gallon and more the 7 gallon to the 5 gallon. Fill the 7 gallon and fill the 5 gallon with the 7 gallon. You now have 6 gallons in the 7 gallon container.

Enjoy.

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15y ago

1. Fill up the 5 gal. jug

2. Fill the 3 gal. jug from the 5 gal.

3. There will be 2 gallons left in the 5 gal. jug.

4. Empty the 3 gal. jug, and pour in the 2 gallons from the other jug.

5. Fill the 5 gallon jug again.

6. You figure it out from here.

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15y ago

Fill up the 9 qt. jug. Fill up the 4 qt jug using water from the 9 qt. jug. That will leave 5 qts. in the 9 qt. jug. Dump out the water in the 4 qt jug and fill it again with the water that remains in the 9 qt jug. Now you have just one qt. in the 9 qt jug. (9 - 4 = 5. 5 - 4 = 1) Dump out the water in the 4 qt jug again. Pour the remaining 1 qt from the 9 qt jug into the 4 qt jug. Now you have 1 qt of water in the 4 qt jug leaving room for 3 more quarts. Fill up the 9 qt jug again and then pour it into the 4 qt jug until it is full. Now you have 6 qts in the 9 qt jug.

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10y ago

a slow way of doing it is:

fill 3l, empty into 8l. fill 3l, empty into 8l. fill 3l, empty as much as you can into 8l, but you will have 1 left over (3+3+3 = 9. 9-8 is 1), so empty this into a basin. Repeat 3 more times to get 4 litres

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13y ago

You fill up the three gallon can and then put it into the five gallon can. You re-fill the three gallon can and pour it into the five gallon can until full. You now have 1 gallon in the 3 gallon can. You dump out the five gallon can and then pour in the 1 gallon from the 3 gallon can into the five gallon. Then you re-fill the three gallon and pour it into the five galllon.

You now have 4 gallons in the five gallon can! :D

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14y ago

You fill the 3 gallon jug up and pour it into the 5 gal jug. then fill the 3 gal jug up again and use it to fill up the 5 gal jug. now you have 1 gallon left. empty the 5 gal jug. pour the one gallon in it, then fill up the 3 gal jug up again, pour it into the 5 gal jug. now you have 4 gallons

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13y ago
  • Fill the 3 Gallon Jar to the top.
  • Transfer this to the 5 Gallon jar.
  • Fill the 3 gallon jar up again. You now have 3 gallons in both jars.
  • Fill the 5 Gallon jar up to the top using the 3 gallon jar. You now have 5 gallons in the 5 gallon jar and 1 gallon in the 3 gallon jar.
  • Empty out the 5 gallon jar and then empty the 3 gallon jar into the 5 gallon jar. You now have 1 gallon in the 5 gallon jar and 0 gallons in the 3 gallon jar.
  • Finally, fill the 3 gallon jar up to the top and then empty the 3 gallon jar into the 5 gallon jar.

Voila! You now have 4 gallons in the 5 gallon jar.

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Anonymous

Lvl 1
3y ago

fill up the 5 gallon jar. pour it into the 3 gallon jar. you have 2 gallons left in the 5 gallon jar. empty out the 3 gallon jar. put the 2 gallons into the 3 gallon. fill up the 5 gallon. fill up the 3 gallon jar with the 5 gallon jar. there is then 4 gallons left in the 5 gallon jar.

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Q: How do you get 4 gallons of water by using a 3 gallon jug and a 5 gallon jug?
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