\[\boxed{\mathbf{27.}}\]
\[1)\ 3 \cdot 6 = 18\]
\[6 \cdot 3 = 18\]
\[18\ :3 = 6\]
\[18\ :6 = 3\]
\[4 \cdot 6 = 24\]
\[6 \cdot 4 = 24\]
\[24\ :4 = 6\]
\[24\ :6 = 4\]
\[5 \cdot 6 = 30\]
\[6 \cdot 5 = 30\]
\[30\ :5 = 6\]
\[30\ :6 = 5\]
\[2)\ Кубов - 6;\]
\[брусков - 3.\]
\[Брусков\ меньше,\ чем\ кубов.\]