how do act scale scores?

<p>For anyone who has the RED ACT BOOK, there's three scale score coversion table in the back of the book, and they have different scales!
For example in test in one in order to get a 30 you need answer 52 question correctly, on test 2 you nedd 52-53, on test 3 you need 53-54. Which one is the scale ACT use right now? I try to find it on act website but couldn;t find any.</p>

<p>Completely depends on the test. Harder questions, easier curve. Easier questions, harsher curve.</p>