Quantitative Reasoning in the Revised General GRE, like Verbal Reasoning has two sections with 20 questions each and for which 35 minutes solving time is given per section. Each Quantitative Reasoning section has mix of question types:
single correct choice (i.e. radio button questions –vertical and horizontal)
This makes a total of 7 different formats which are illustrated in the screenshots below. The screenshots are of the Dilip Oak’s Online test, but they will give you a good idea of what these formats will look like when you take the GRE computer-based test.