Difference between 2nd and 4th ed of Official Study Guide?

<p>Does anyone know what the differences are between the 2nd and 4th editions of The Official SAT Study Guide? (Besides error corrections.) Are the tests the same? Are they in a different order?
I have to tutor someone in SAT math tomorrow. He sent me the test #/ section #/ problem # that he missed. But in my book those sections aren't math.
ANY help would be appreciated.
Thanks!</p>

<p>Never mind. I found the info. Thanks!</p>