Startup Idea : Quiz through IVR

A quiz backed with monetary prizes, available at all the time to all the people across geographies. The idea works like this: Quiz taker dials a toll free number in his free time (say 10 mins while s/he relaxes having tea!) and answers objective questions after listening to it just by pressing the right number of the objective answer. If he answers all the questions right, then the said prize is given to him. For making money out of this concept, the quiz conductor has to run audio advertisements before and after the quiz session. The USP of this idea is that this can be attempted by people (of any language) who don't know how to write. All that the person has to do is to listen to the question and press the right button on his mobile to convey the correct answer. That's all!