<PRE><B>Question 1145147</B>
1.  Fill the 9 gallon container
2.  Fill the 4 gallon container from the 9 gallon container
3.  Empty the 4 gallon container into the tank
4.  Repeat steps 2 and 3
5.  Now there is 1 gallon in the 9 gallon container
6.  Pour the 1 gallon in the 9 gallon container into the 4 gallon container
7.  Fill the 9 gallon container
8.  Fill the 4 gallon container from the 9 gallon container, this leaves 6 gallons in the 9 gallon container
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Note the 4 gallon container had 1 gallon in it to before step 8
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