drag and drop

Yes, this is easily done. Either in the Interaction Wizard (when setting up the Drag and Drop) or in the Drag and Drop tab, select all of the x's and click "Add New Type". This makes the interaction consider all of the x's to be interchangeable, and when you set the correct answer for one it will set it for all objects of that type. Types work for both Drag Sources and Drop Targets, so you'll want to set up four Types: Drag_X, Drag_Check, Target_X, and Target_Check.

Here's the drag and drop help page if you need more info: http://helpx.adobe.com/captivate/using/drag-and-drop-interaction.html

Sure thing.