The rank command returns the nth largest element item from the remaining arguments.

Numbering starts at 1.

$\mathrm{MapleTA}:-\mathrm{Builtin}:-\mathrm{rank}\left(3\,2\,4\,6\,5\,7\right)$

$5$

The MapleTA[Builtin][rank] command was introduced in Maple 18.

For more information on Maple 18 changes, see Updates in Maple 18.