Now that PowerPoint allows you to easily save your slides as jpegs, it's a simple job to create these quizzes for mobile phones or any mobile device using PowerPoint. Just watch for the way PowerPoint numbers the slides so that you don't get caught out with slide1 being followed by slide11 (rather than slide2). To prevent this, you may want to re-number the slides slide01, slide02 etc.
Download the resources here.
My previous post on creating jpeg quizzes using MS Paint can be found by clicking here. It also contains the videos showing the quiz on a mobile phone.