<p>The amount of problems you can miss for a certain score varies based on the calculated 'difficulty' of the test.</p>
<p>For example . . . </p>
<p>Test A: (from minus 0 to minus 1 RAW score) 800 800 790 770 760 740 . . .
Test B: 800 780 770 750 730 710 . . </p>
<p>This means Test A was more difficult.</p>