If they are just old apps then you can delete them though connection with iTunes. For your iPAD there is a separate Apps tab and you can remove each one through tapping on the remove button.
You may also wish to clean them out of your iTunes Library of Apps - ths would prevent any further confusion later on.
You should back up before doing this and then when happy with the result on your iPAD back up again, at least that's what I do.
From some reason, when I delete an app via iTunes, it's no longer being deleted from my iPad. When I sync, I no longer get the warning message that an app will be deleted. In order to remove it from the iPad, I have to delete it directly.
This is a change. I'm wondering if I accidentally changed some preference setting or if Apple changed the behavior in one of the iOS releases.
We also can no longer delete music from iCloud via iTunes. I often highlight an article in my web browser and send the highlighted text to iTunes so I can listen to Alex speak the text while I do other things. Now my iTunes is uploading the recordings to iCloud and after listening when I want to delete it, I no longer get the double prompt one of which used to ask me "Delete from iCloud?" I am only informed the mp3 will be "hidden in iCloud". So what happens to our max upload count if we cannot selectively delete items from iCloud? We may even decide as privacy issue we do not want something in iCloud.
This is just plain wrong.