if you guys are worrying about the math test, you are worrying about the wrong thing. i would not even bother trying to prepare for the test; either you can do the question or you cannot.
the only mathematical skills you will need are those you learned in primary school, i.e. simple arithmetic. the only "hard" mathematical bit is probably the multiplication of larger numbers, i.e. those with 3 to 4 digits? and multiplying fractions. if you can do these basic calculations, there is no need to prepare at all... they are not going to ask you to do any calculations beyond arithmetic!
i'm hardly a math expert myself, but i found this test easier then i had expected.