There are many sections/categories of questions in the computerised aptitude tests. While some of these tests can be improved through practise, most of the others are somewhat a part of your personality, the way you think/analyse a problem etc and these attributes can't be improved significantly in a short period of time.
There are some questions like: Choose the number that fits the following sequence: 1 2 4 8 16 32, or Choose the picture that best fit the preceeding sequence of pictures. You can find samples of such questions from the National Library. Just look under MENSA quizes/puzzles.
While I can't comment on the benefits or effectiveness of the course that you mentioned, I'm sure it will be a good exposure to the kind of tests that you will be subjected to. Of course it also depends on how much $$$ it costs to attend this course.
Best wishes,
9V