big discrepency for math 2c prac tests

<p>okay, i took some of barron's tests and on the last one, i got like a 550. then i take a sparknotes test (sparknotes 5 additional prac tests book) and i get an 800. so now im a bit worried. how close are sparknotes tests to the real thing?</p>

<p>also, do the barron's prac tests get harder and harder? after going through it, my best score was on the diagnostic :(</p>

<p>Barrons is known for being harder than the actual test. No clue about Sparknotes though.</p>

<p>does anywhere have free practice tests??!!</p>