In your situation, I'd be annoyed and disappointed and frustrated, too. But I don't
think the college is really the right entity for you to be ticked off at.
Schools have 12 years to teach at least arithmetic and algebra. That is a very, very long time. If the schools aren't doing their jobs, then parents have to step in to fill the void. The problem is that parents often don't know that there is a problem.
If colleges refused to accept any student that needed remedial classes, I guarantee you would see a jump in the quality of the high school program because the parents would demand it.
An example she mentioned from the test was the square root of 95. I don't know what her choices were so I can't comment on how difficult that would be to solve.
Doing math in your head or on scratch paper is ideal, but is it really expected of students in this day and age?