Question

Measure exactly 2 liters of water if you have:
1. 4 and 5-liter glass
2. 4 and 3-liter glass

Answer 1

1. 4 and 5-liter glass

   4 L glass 5 L glass
   4 0 (on filling 4 L glass fully.)
   0 4 (on pouring 4 Lglass into 5 L glass)
   4 4 (on filling 4 L glass fully.)
   3 5 (on pouring 4 Lglass into 5 L glass)
   3 0 (on removing 5 L glass)
   0 3 (on pouring 4 Lglass into 5 L glass)
   4 3 (on filling 4 L glass fully.)
   2 5 (on pouring 4 Lglass into 5 L glass)

Hence the desired result.

1. 4 and 3-liter glass

4 L glass 3 L glass
0 3 (on filling 3 L glass fully.)
3 0 (on pouring 3 L glass into 4 L glass)
3 3 (on filling 3 L glass fully.)
4 2 (on pouring 3 Lglass into 4 L glass)