5 sticle pline le impartim in jumatate.primim 10 sticle pline pe jumatate .
Sticle goale ramin numai 3.
10+11=21 de sticle pline pe jumatate
21:3 persoane=7 (cite 7 sticle pline pe jumatate la fiecare)
8-5 sticle pline=3 sticle goale
Raspuns:cite 7 sticle pline pe jumatate si cite 1 sticla goala.