Seven-liter 80518

Happy Mom needs to measure exactly 6 liters of water. It only has a five-liter and a seven-liter container. How can a mother measure exactly 6 liters of water by gradually pouring? He doesn't care about other containers.

Correct answer:

n =  2

Step-by-step explanation:

$$\begin{gathered} V=6\text{l} \\ {V}_1=5\text{l} \\ {V}_2=7\text{l} \\ {V}_3=\frac{V_1+V_2}{2}=\frac{5+7}{2}=6\text{l} \\ n=2 \end{gathered}$$

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