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

12 Practice Tests for the SAT
Practice Test Twelve Answers and Explanations I
1093
are equally spaced from the median. The effect of this
arrangement is that, again, the median equals the average.
You're left with (B) and (D). In which case would the
average be pulled higher than the median? The 3 in (B)
pulls the average of that set slightly above the median, while
the -3 in (D) pulls the average of that set slightly below the
median.
6. c
Difficulty: Medium
Strategic Advice: Questions such as this one assess your
ability to perform multistep operations. Move quickly but
carefully and pay attention to where you're going.
Getting to the Answer:
7. D
0.4(2 l 0) = 84
84 = 33 _!_O/o(x) 3
84 =
x
100
(84) (
Difficulty: Medium
: g )
10 (x)
(84)(3) 252
Strategic Advice: You'll need to bring your knowledge of
the properties of triangles and parallel lines into play if you
want to solve this question.
Getting to the Answer:
8. c
Difficulty: Medium
Strategic Advice: Questions involving minimum and
maximum values can seem intimidating on first glance but
often, as in this case, boil down to a few simple scenarios.
Getting to the Answer:
First, try the possible scenarios:
3x +y= 17
3(1) + (14) = 17
3(2) +(11)=17
3(3) + (8) = 17
3(4) + (5) = 17
3(5) + (2) = 17
Now find the range of y: 14 - 2 = 12
9. E
Difficulty: Medium
Strategic Advice: If you forget your percent formulas, this is
also an excellent problem for an educated guess. You know
that 40 percent of something is substantially less than 70
percent of the same thing, so the best answer is probably
either (D) or (E).
Getting to the Answer:
percent = p art
x 100
woe h l
Call the unknown whole x.
70
lOOx =2,100 100
X =2, 100
70
X = 3,000
Call the unknown part y.
m
16 0 0 (3,000) = y
1,200 =y
If c = 50, the angle vertical to it also equals 50.
The angles of a triangle must add up to 180, so
a + b + 50 = 180, and
a+b= 130
Solve for a, and you find that a = 130 - b, (D).