6. Given the universal set $I=\{x \mid 1 \leqslant x \leqslant 100, x \in \mathbf{Z}\}$ and its two subsets $A=\{m \mid 1 \leqslant m \leqslant$ $100, m=2 k+1, k \in \mathbf{Z}\}, B=\{n \mid 1 \leqslant n \leqslant 100, n=3 k, k \in \mathbf{Z}\}$, the largest element in $\bar{A} \cap B$ is $\qquad$ .
6. 96 .
$$
\begin{array}{l}
\quad I=\{1,2,3,4, \cdots, 99,100\}, A=\{1,3,5,7, \cdots, 97,99\}, B=\{3,6,9,12, \cdots, \\
96,99\} .
\end{array}
$$