Alive Without Breath
…and a whole box of riddles to unlock
I am alive without breath and as cold as death. I am never thirsty, though I always drink. What am I?
Logic Puzzle
The Two Jugs
You have a 5-litre jug and a 3-litre jug and a tap. Neither jug has markings. How do you measure out exactly 4 litres?
MathsPlanningAges 9–11 · 12+Sample content
Getting The Two Jugs ready…
About this game
How to play
- Fill a jug from the tap, pour it away, or pour one jug into another.
- A pour stops when the first jug is empty or the second is full.
- Get exactly the right amount into a jug to win.
Three levels
- Easy: Two jugs and a tap. Measure an exact amount.
- Medium: Bigger jugs and trickier amounts.
- Hard: Three jugs, no tap: share the juice fairly without spilling a drop.
What this teaches
You never measured 4 directly. You built it from differences. Combining known quantities to reach an unknown one is the heart of a great deal of mathematics.
Keep playing
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