 
 <translate> Pouring the 5 - liter bucket into the 3 - liter bucket leaves 5 - 3 = 2 liters, which go into the 6 - liter bucket. Then there are 6 - 2 = 4 liters that can be added.
The final answer: 4. <ibo> Ọ bụrụ na anyị awụnye mmiri dị lita ise n'ime mmiri dị lita atọ, anyị ga - enwe lita ise na atọ, ya bụ, lita abụọ, ga - abanye n'ime mmiri dị lita isii. Mgbe ahụ, e nwere 6 - 2 = 4 lita nke a pụrụ ịgbakwunye. Azịza ikpeazụ ya bụ: 4. 