I found a wonderful article on Mozart's music and more and I urge you to read up on this. I've personally used the K448, a piece Mozart wrote for two pianos and have found it to work. When you're studying and need to memorise something quickly, it's a great tool.
Just copy and paste the url code below into your browser to access this excellent webpage.... http://www.smart-kit.com/s245/how-the-amazing-mozart-k 48-can-increase-your-iq-listen-now