Hint
Start by filling the 9 gallon container, and then use that to fill the 4 gallon container.
Answer
Here are the contents of the containers after each stage:
A B
9 0 fill A
5 4 fill B from A
5 0 empty B
1 4 fill B from A
1 0 empty B
0 1 fill B from A
9 1 fill A
6 4 fill B from A
6 0 empty B
This leaves 6 gallons in container A.
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Puzzle 78
What well-known saying has been altered below:
lla doog shingt eomc ot ehost ohw taiw
Take the Roman numerals in sequence, and convert to the phonetic alphabet.
1 = I = India
5 = V = Victor
10 = X = X-Ray
50 = L = Lima
100 = C = Charlie
500 = D = Delta
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Puzzle 80
Using the letters EEEENNNNPPSS complete this grid. The grid reads the same across as down.
