puzzle.1

fill the 3L jug with water and pour all of it into 5L jug. again fill the 3L jug and pour it into 5L jug. now you will have 5L in 5L-jug and 1L in 3L-jug. throw all the water in the 5L-jug and put 1L from 3L-jug to the 5L-jug. now there is 1L in 5L-jug and 3L-jug is empty. fill the 3L-jug again and put the water in 5L-jug and you will have exactly 4L in 5L-jug. I hope that solves the problem.

I know what I'm gonna mention is absolutely out of this context, but I couldn't find a better topic to respond under!Its about puzzles but no ordinary puzz;es puzzle jugs... A puzzle jug is a puzzle in the form of a jug. The challenge—to drink the contents without spilling, which, because the neck of the jug is perforated, is impossible to do conventionally—is often written on the jug.Some such inscriptions are these: -Come drink of me and merry be. -Fill me up with licker sweet for it is good when fun us do meet -Gentlemen, now try your Skill/I'll hold your Sixpence if you Will/That you dont drink unless you spill -Here, Gentlemen, come try your skill/I'll hold a wager if you will/That you don't drink this liquid all/Without you spill and let some fall The earliest example in England is the EXETER puzzle jug a fine example of medieval pottery in Britain, dating from about 1300 and made in Saintonge, Western France. Puzzle jugs of varying quality were popular in homes and taverns,especially during the 18th and 19th centuries. The solution to the puzzle is that the jug has a hidden tube, one end of which appears to be the spout. The tube usually runs around the rim and then down the handle, with its other opening inside the jug and near the bottom. To solve the puzzle, the drinker must suck from the spout end of the tube.To make the puzzle more interesting, it was common to provide a number of additional holes along the tube, which must be closed off before the contents could be sucked. The puzzle jug is a descendant of earlier drinking puzzles, such as the fuddling cup and the pot crown, act of which has a different solution.