Don't use Adobe Reader to do this. If there IS a way, I haven't found it nor has any posting I've read tell you that it can be done. However, it's EASY to do this in Preview. Right click on the file and select Open With. Select Preview if it isn't the default. In Preview, select only the pages you want by clicking on the thumbnails while holding down the Command key. Go to File and Save As. Rename the file. Only the pages you selected will be saved in the new file.