I find that when updating Numbers, Keynote, or Pages, that it is best to update each of them solo. They sometimes pop up in the update list with other apps, but if I select Update All it often gets stuck on one of these big apps from Apple. Then it takes forever, or so it seems, to install anything. When I select each of these three apps separately and update it solo, it tends to update much better/faster. I'm not sure why this is, but it just seems to be one of those quirks that occurs.