# Questions tagged [decanting-problems]

A strategic puzzle centered around pouring liquids between various bottles, with the goal of measuring exactly n liters.

29 questions
Filter by
Sorted by
Tagged with
1k views

### Unexpected Delay while Mixing Shots

You are hosting a party, and everything is going perfectly well, until you ask if anyone wants a kuulalaakeri shot. (In case you are not familiar with this highly treacherous Finnish beverage, it has ...
2k views

### A thirsty king and his knights

The black king has spent his life fighting over this strange checkered land, the white king has finally been defeated and his troops have surrendered and pledged allegiance to him. Now he's not sure ...
1k views

### Measuring Water with a Holey Cube

You have been given a transparent glass cube, which has a small hole at the center of one of the faces. How can you fill the cube with water occupying exactly one third of its volume? Edit: The ...
7k views

### A general solution to the decanting problem? (aka jug-pouring, water-pouring)

Take a look at these two questions: - A Set of Water Jug Challenges - Pouring problem Now I'm asking for a generalised solution to that problem. I define the problem as follows: You are required ...
1k views

### Can YOU Save the Earth?

Aliens from TRAPPIST-1 — or, as they call it,  ·́ͪͪ̾̊̏ͬͭ͊͆̑́̍ͥ͗͜͞҉ ̴̷̉̿́̈͌̊͐ͮ͘͜·̵̵̨́͌̒̾ͦͩͯ͌͐̅̃̂̋̃̀͟·̷̢ͪ͑͆ͥ́ ̷̷̴̛͊͐̅͗̎̎ͬ́·̴̾̋͑͊̊ͥ̓ͣ̆̔̎̋̀͠҉͢ ̵̽̿̄ͩ̀̍ͩ̾̈ͣͬ͗̃̆̍͘͟·ͧ͐̾͆̅͢҉ ̴̢̛̏ͨͨ̾́̈́̋͋͛̓̀͛ͪ̚·...
331 views

### Ugh, I decant even

You know those decanting-problems, where you have two jugs of different sizes, and a water fountain, and you need to get a specific amount of water into one of the jugs using the smallest number of ...
2k views

### Water Jugs (10, 5 and 6) -v2- [duplicate]

I have three water jugs, one with 10 liters another with 5 and another with 6, how do i get 8 liters on the first one with 10 liters of water available. (so you cannot fill 10 liters jug again)
17k views

### Measuring the amount of liquid in a container without a measuring tool [closed]

The Problem Let's say you are asked to measure the amount of liquid in a container, but you are not allowed to use any direct measuring tool (such as a balance, ruler, or anything of the sort). You ...
698 views

### Split into two equal quantities

You have a container of a capacity of 12L filled with water. Your task is to split that quantity (12L) of water into two equal quantities (6L) using only two additional containers: one of a capacity ...
33k views

### Split 12 liters in half with 5 and 8 liter bottles [duplicate]

You have 12 liters of apple juice in a 12 liters bucket and you want to share it with your best friend. But you have an empty 8-liter and an empty 5-liter bottle. How do you split the apple juice in ...
23k views

### Water jug for gaining 8 gallons of water? [duplicate]

I have gone through simple water jug problems like this link but when there are 3 jugs: 16 Galoon jug with water filled. 11 Galoon empty jug. 6 Galoon empty jug. Find a solution to gain 8 Galoon, ...
4k views

### A Set of Water Jug Challenges

You've probably heard about challenges with water jugs, so why not try a few? Use 3- and 5- liter jugs to get 4 liters. Use 5- and 7- liter jugs to get 4 liters. This one's different. How many ...
17k views

### Water Jugs (10, 5 and 6) [duplicate]

I have three water jugs, one with 10 liters another with 5 and another with 6, how do i get 8 liters on the first one?
2k views

### Lethal Solution

You are given 4 identical glasses, completely filled with transparent, odorless liquids. Three of the liquids are pure water, and the fourth is poison, which is slightly heavier. If the water glasses ...
490 views

### Filling water jugs

You have three jugs with volumes of 12, 8, and 5 liters. The 12L jug is full of water, while the other two jugs are empty. You have no other source of water. Using these jugs, how can you obtain ...
801 views

### Trying to find a water measuring puzzle

I am trying to find this puzzle which I once came across as a kid, but can't seem to recall it properly now (or find it). It goes something like this. There is a reservoir of capacity 20 litres ...
3k views

### Pouring problem [duplicate]

You are in the possession of two bottles, one with a capacity of 7 litres and one with a capacity of 11 litres. Next to you is an infinitely large tub of water. You need to measure exactly 2 litres ...
798 views

### Fill the jar 3L & 5L [duplicate]

You have infinite amount of water.Your have given two jars one is of 3 liters and second is of 5 liters. Task :- you have to calculate 4 liters of water in jar;
111 views

### Collecting 9 oz of rum with a 5 oz and a 12 oz flask

Raffeal has purchased a ticket to dip his home-brought flask into a free-flowing rum collection pool and take 9 oz of rum. His rum will be weighed before leaving and if it weighs more than 9 oz (not ...
77 views

### Making Muffins - Amount to the Batter

You’re making muffins and need to add 1/3 (one third) of a cup of sugar to the batter. You check the cupboards and find that you only have the following measuring cups: a 2/3 (two thirds) cup, and a 1/...
151 views

### The 2 jugs again? [duplicate]

We know that classical puzzle of getting 4 liters from 2 jugs of 3 liters and 5 liters capacity. (or was it gallons?) But what about other volumes? And what if the jugs had different volumes? For ...
1k views

### Three Gallon Jug and 5 Gallon Jug [duplicate]

One of the classical puzzles is pouring water into the 5 gallon jug so there is 4 gallons of water remaining. This was popularized by Bruce Willis in "Die Hard with a Vengeance". I was wondering ...
10k views

### A Water Jug Problem [duplicate]

Suppose you are given two jugs: a 4-gallon one and 3-gallon one, and neither has any markings on it. You have a pump that can be used to fill the jugs with water. What do you do so that exactly 2 ...
2k views

### Measuring volumes with oil drums of 8 and 5 litre [duplicate]

You have two drums of capacity 8 litre and 5 litre and a resource of oil, can you use these two drums to give 1 litre, 2 litre, 3 litre, 4 litre, and 6 litres and 7 litres to any customer? If yes, ...
127 views

### Using only a 5-gallon bucket and a 3-gallon bucket put exactly four gallons of water in the 5-gallon bucket [duplicate]

Assuming you have an infinite supply of water. No measurement markings on the buckets. How do you fill the buckets in the right way?
119 views

### Get 2 liters from 4 and 5 liter buckets [duplicate]

You have a 4 liter bucket and a 5 liter bucket and an (infinite) supply of liquid. How do you get 2 liters?
146 views

### Water Difference

While solving a puzzle, I misinterpreted the whole thing and ended up creating a new harder puzzle. Here it is: You have 2 cups filled with water, cup A is 5oz and cup B is 3oz. How can you get one ...