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12.Practice.Tests.for.the.SAT_2015-2016_1128p

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12 Practice <strong>Tests</strong> <strong>for</strong> <strong>the</strong> <strong>SAT</strong><br />

204 Practice Test Two Answers an d Exp l anations<br />

Getting to t h e Answer:<br />

(A) 243x = 35(35) = 3 10<br />

(B) 3x2 = 3(35)2 = 3(3 10 ) = 3 11<br />

(C) 9x 4 = 32(35) 4 = 32(320 ) 322<br />

(D) 27x3 = 33(35)3 = 33(31 5) = 3 1s<br />

(E) x6 = (35)6 = 330<br />

12. B<br />

Difficu l ty: Medium<br />

Strategic A d vice: You can rearrange <strong>the</strong> average <strong>for</strong>mula<br />

to get whichever part you're missing. For example, sum =<br />

(average) x (number of items).<br />

Getting to t h e Answer:<br />

7 < sum < 12<br />

7<br />

49 < sum

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