DSST Scoring?

[musictester]

Hi everyone,
How is the DSST scored? Is it out of 500, or 50? I know those are scaled scores, not raw, so about what percentage of the questions do you have to get right to pass? I am taking the Environ. Science and Humanities DSST next week. For those who have taken it, how hard is it compared to practice tests? I am going the free route, so lots of library books, and online resources. Is there anything I should do to prepare last minute? :confused:
Thanks!

[marselsaadeh]

My advice would be IC and Cliffnotes, the only two sources you'll need to pass.

[musictester]

Thanks for the great suggestion of Cliffnotes! I will be using that!