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