The interactive multiple choice questions correspond to the multiple choice questions in GCSE and IGCSE exam papers. They are in PowerPoint format and should be run as a slideshow. Each set contains approximately 20 questions. Correct answers are indicated as well as explanations of the reasons for rejecting the alternatives. We recommend that you download the PowerPoints and run them from your disk. If you do not have PowerPoint installed you can download PowerPoint Viewer free here.