Collection of water jug riddles
Warning: It's possible that not every puzzle listed here is solvable. It's up to you to determine whether each is solvable.
- 5 unit jug, 4 unit jug
- both jugs start empty
- infinite source of liquid
- goal is 3 units
- source/solution
- 5 unit jug, 3 unit jug
- both jugs start empty
- infinite source of liquid
- goal is 4 units
- source/solution
- 8 unit jug, 5 unit jug, 3 unit jug
- 8 unit jug starts full
- no external source of liquid
- a jug can only be emptied into another jug
- goal is to measure 4 units
- source/solution
- 4 unit jug, 9 unit jug
- both jugs start empty
- infinite source of liquid
- goal is to measure 1, 2, ..., 9 units
- source/solution
- 6 unit jug, 15 unit jug
- both jugs start empty
- infinite source of liquid
- goal is to measure 5 units
- source/solution
- 12 unit jug, 8 unit jug, 5 unit jug
- 12 unit jug starts full
- no external source of liquid
- a jug can only be emptied into another jug
- goal is to measure 6 units
- source/solution
- 10 unit jug, 7 unit jug, 3 unit jug
- 10 unit jug starts full
- no external source of liquid
- a jug can only be emptied into another jug
- goal is to measure 5 units, in two separate jugs
- source/solution