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Cum putem masura 5 litri de apa avand la dispozitie un vas de 3 litri si altul de 7 litri?

Răspuns :

Ok, uite vasul cu 3 litri fi A si celalalt B.

Umplem B, 0 7
Turnam B->A, 3 4
Aruncam B, 3 0
Turnam A->B, 0 3
Umplem A, 3 3
Turnam A->B, 0 6
Umplem A, 3 6
Turnam A->B, 2 7
Aruncam B, 2 0
Turnam A->B, 0 2
Umplem A, 3 2
Turnam A->B, 0 5.