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Water jugs: measure it exactly.
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How to play Water Jug Puzzle
- Tap a jug, then tap another to pour.
- Fill or Empty when there is a tap.
- Reach the target amount.
Tips and strategy
- A pour stops when one jug is empty or the other is full.
- Keep track of what is left behind: that is often the answer.
- With 3 and 5: fill the 5, pour into the 3, and look what remains.
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FAQ
Water Jug Puzzle: questions
How do you get 4 litres with a 3 and 5 litre jug?
Fill the 5, pour into the 3 (2 left), empty the 3, pour the 2 in, fill the 5 again, top up the 3 (4 left in the 5).
How do you solve the 8, 5 and 3 litre puzzle?
Pour back and forth so that one litre at a time moves between jugs; it takes 7 pours to get 4 and 4.
Why is this puzzle good for children?
It practises subtraction, planning and checking, and shows that a simple rule can solve a hard problem.
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Questions about classes?
A parent or guardian can share the learner's age, level and goals, and we'll suggest a starting point and confirm the format before anything is booked.
- Tell us the learner’s age or grade and goals
- We’ll suggest a suitable class or learning path
- We’ll confirm format, timing and fees with a parent or guardian