Measuring water puzzle Given two unmarked jugs, one which holds 7 liters, and another which holds 11 liters, an unlimited supply of water, and no need to conserve, how do you measure exactly 6 liters? I would also like to know whether there is a single solution , many solution or no solution? Can it measure any amount?

Multiples of 7: 7,14,21,28,35...

Multiples of 11: 11,22,33.

We observe that the difference 6 appears between 28 and 22

So you keep filling the 7 liter jug and emptying it into the 11 liter jug

After 4 fillings you will be left with 6 liters in the 7-liter jug

**Edit** :adding 2nd solution.

Likewise you can search for a multiple of 11 that is 6 more than a multiple of 7.

55=5*11, 49=7*7

So you can fill the 11 liter jug 5 times and empty it in the 7 liter jug. In the end you will be left with 6 liters in the 11-liter jug