How can increase my CR score in 2.5 weeks? Please?

<p>I'm currently getting 450-510 but i really want to get above 600. Is it possible to increase by that much? Can you give me some advise on how to increase it, I'm also checking the mistakes that i made in the previous tests. I'm trying to memorize words from hit parade.
please I need some serious help! This is my last chance to give this test because I'm going to apply college this year. </p>

<p>Thanks!</p>