\[\boxed{\mathbf{7.}}\]
\[6\ :6 = 1\]
\[12\ :6 = 2\]
\[18\ :6 = 3\]
\[24\ :6 = 4\]
\[30\ :6 = 5\]
\[36\ :6 = 6\]
\[42\ :6 = 7\]
\[48\ :6 = 8\]
\[54\ :6 = 9\]
\[60\ :6 = 10\]