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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 />

Practice Test Ten Answers and Explanations<br />

909<br />

Getting to <strong>the</strong> Answer:<br />

1.25x= 150<br />

X= 120<br />

Expressed as a percent, 120 is 1.2.<br />

1 .2(75) = 90<br />

6. B<br />

Difficulty: Medium<br />

Strategic Advice: Questions such as this entail mechanical<br />

calculation based on abstract reasoning. Do <strong>the</strong> latter first;<br />

<strong>the</strong>n do <strong>the</strong> mechanical calculation quickly but carefully.<br />

Getting to <strong>the</strong> Answer:<br />

The point on <strong>the</strong> semicircle far<strong>the</strong>st from <strong>the</strong> x-axis is <strong>the</strong><br />

topmost point of <strong>the</strong> semicircle-<strong>the</strong> point directly above<br />

<strong>the</strong> center of <strong>the</strong> semicircle. If <strong>the</strong> diameter of <strong>the</strong> circle is<br />

5, its radius is 2.5. So 1 (<strong>the</strong> point on <strong>the</strong> x-axis at which <strong>the</strong><br />

semicircle starts) plus 2.5 is 3.5.<br />

7. A<br />

Difficulty: High<br />

Strategic Advice: You can manage this question by using<br />

algebra or by Picking Numbers.<br />

Getting to <strong>the</strong> Answer:<br />

Imagine that b = l and that c = 1. Then a= 12. Triple<br />

12b 4 1213\ 4 ( ) ( )<br />

band c and <strong>the</strong>n --<br />

c<br />

= 3<br />

= 12 81 324<br />

3 '<br />

which is 12 x 27.<br />

8. D<br />

Difficulty: High<br />

Strategic Advice: Use <strong>the</strong> numbers provided in <strong>the</strong> choices<br />

as hints about <strong>the</strong> kinds of numbers you should have in<br />

mind.<br />

Getting to <strong>the</strong> Answer:<br />

5 < 3 < _l No<br />

5<br />

1

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