Logical Puzzle :: Discussion

First you have to take water from 3lit container and then fill 5 liter container using 3lit again take 3 lit container pour water on 5lit and we are left with 1 liter 

And that 1 lit water pour it on 4 lit container and again take 3 lit container to fill remaining ....

1.  Fill the 5ltr container
2.  5-3=2 So fill the 3L container until it begans to overflow and you have 2 L water in the 5L container now.
3. Now empty the 3L container and put the 2L in it.
4. The 3L container has space for 1L now
5.  5-1=4 So fill the 5L container and fill the remaining 1L in the 3L container. And you have 4L.)