Answer
When I pressed TARE on the scales, it brought a TEAR to my eye, as a piece of metal stuck in my finger. I didn't RATE this as a good experience.
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Puzzle 199
Starting in the bottom left corner and moving either up or right, adding up the numbers along the way, what is the largest sum that can be made?
2
3
6
2
4
2
3
1
5
1
6
1
1
1
7
5
3
5
2
2
3
2
7
2
3
Note: this puzzle is not interactive, and the numbers cannot be clicked.
Answer
Here are the contents of the containers after each stage:
A B
0 7 fill B
3 4 fill A from B
0 4 empty A
3 1 fill A from B
0 1 empty A
1 0 fill A from B
1 7 fill B
3 5 fill A from B
This leaves 5 gallons in container B after 8 steps.