These tests are in flash..so you need to have flash player installed on your machine..and I think there is big difference in answering problems on you paper by reading them on PC and then comparing your answers from answer sheets, and answering problems on the PC itself and check the results online..just like GMAT. If you want just questions in pdf format then please have a look at the google group
http://groups.google.com/group/gmat_may2007 it has plenty of GMAT material.
Still thanks for your input.