The Jugs

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  • 1¬†year, 1¬†month ago
You have 2 jugs. A 5 gallon jug and a 7 gallon jug. There are no marks on the jug to show the difference between each gallon.

How do you get 6 gallons exactly?
Show Answer!
First fill up the 5 gallon jug and pour it into the 7 gallon jug. Now there are exactly 5 gallons in the 7 gallon jug. Then fill the 5 gallon jug up again and pour as much as possible in the 7 gallon jug. Only 2 more gallons will fit in the 7 gallon jug so ther will be 3 gallons left in the 5 gallon jug. Next pour out the 7 gallon jug and pour the three gallons that are in the 5 gallon jug into the 7 gallon jug. There should now be 3 gallons in the 7 gallon jug. Now fill the 5 gallon jug up again and pour as much that will fit into the 7 gallon jug. Only 4 gallons will fit so there should be 1 gallon left in the 5 gallon jug. Again pour out the 7 gallon jug. Pour the 1 gallon the is in the 5 gallon jug into the 7 gallon jug. There should now be one gallon in the 7 gallon jug. Now fill up the 5 gallon jug and pour all of it in the 7 gallon jug. That plus the 1 gallon that is already in there equals to 6 gallon.