How many can I omit?

<p>Hey, I'm taking the Bio-M and US History SATiis this upcoming Saturday. I'm hoping to get a 700+ in both tests, and I was wondering how many I can omit and afford to get wrong to get that 700. All advice helps, thanks guys :)!</p>

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<p>This post really needs to be stickies.</p>

<p>thanks alot mate!</p>

<p>you can omit around 20 in US but you have to get the rest of the questions right to get an 800.</p>