POW 6

9/24/2018

You are standing by the duck pond with two pails. One holds 7 gallons and the other holds 3 gallons. Neither one of them has gallon markings on the side. How can you get exactly 5 gallons of water in the big pail?

Kevin Feng

9/26/2018 09:51:44 am

Fill the big pail to full.
Fill the smaller pail twice, which leaves one gallon in big pail.
Dump the one gallon from the big pail into the small pail.
Fill the big pail again.
Fill the small pail using the big pail.
Since there is already one gallon in the small pail, it would take 2 gallons to fill it. Which mean 7-2 = 5 which means the big pail would have 5 gallons in it.

Jacob Luu

9/26/2018 09:54:25 am

7 - 3 = 4 So you fill up the large pail and fill the small pail with the large one. Then you will have 4 gallons. Since you will have 4 gallons, you an dump 3 gallons from the small pail and fill it up another time. Then you will only have one gallon in the big one. Now, you have 1 gallon in the smaller pail and nothing in the larger pail. Fill the larger one up again, and you have 7 gallons in the larger one. Fill up the smaller pail, and since it already has 1 gallon, you have 2 gallons left to fill up. When we 7 - 2 = 5, we have 5 gallons left in the larger pail.

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