import flash.utils.Dictionary;

var correctSolution = 50;
var dict:Dictionary = new Dictionary();

for(var i:int=0; i<panel.numChildren; i++)
{
    var mc:MovieClip = MovieClip(panel.getChildAt(i));
    trace(mc.currentFrame);

    dict[mc] = mc.currentFrame;

    mc.mouseChildren=false;
    mc.addEventListener(MouseEvent.CLICK, onBtnClick);
}


function onBtnClick(event:MouseEvent)
{
    var nr = dict[event.currentTarget];
    trace(nr);
    if(nr==correctSolution)
    {
        trace('correct');
    }
    else
    {
        trace('wrong');
    }

}