Divide the wine equally into two.

.

8L

Click a tap to turn the handle.

Click a jug to attach the taps.

Click a jug to attach the taps.

1. Pouring stops automatically if one of the jugs becomes full.

1. | Abbot Albert wrote a version of this puzzle ~1240. [5] |

2. | NiccolĂ˛ Fontana Tartaglia wrote a version of this puzzle in the 1500s. [4] |

3. | In the film Die Hard With a Vengeance (1995), New York City Police Lieutenant John McClane (Bruce Willis) and shopkeeper Zeus Carver (Samuel L. Jackson) team up and solve a version of this puzzle to stop a bomb from exploding. |

4. | Professor Stewart's Hoard of Mathematical Treasures (2010), by Ian Stewart. |

5. | Rediscovering Mathematics: You Do the Math (2011), by Shai Simonson. |

You have an 8 liter jug full of water, and two empty jugs which respectively hold 3 and 5 liters.
Measure precisely 4 liters of water by
pouring between the jugs.

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