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

12 Practice Tests for the SAT
564 Practice Test Six Answers and Explanations
13. c
Difficulty: Medium
Strategic Advice: Be sure to understand the chart given
before trying to tackle the problem. In multiple-choice
problems like this, work through all the possibilities and
eliminate choices as you go.
Getting to the Answer:
For Richmont, the population increases from 50 to 200, which
is definitely more than l. Eliminate (A), (D), and (E).
2
For Pierdson, the population decreases, so eliminate (B).
For Thomasville, the population increases from 200 to 400.
Only Ill works.
14. B
Difficulty: Medium
Strategic Advice: To find percent increase, determine the
difference between values and divide by original value.
Getting to the Answer:
Total population in 1986 = 950
Total population in 1999 = 1,425
15. c
1,425 - 950 =
475 = 50%
950 950
Difficulty: Medium
Strategic Advice: This problem can be solved through
careful reasoning, but if you're still confused, you can
perform the logic-question equivalent of Picking Numbersmake
up some imaginary characters to fit the situation and
see which statement holds true.
Getting to the Answer:
Let Amanda, Ellen, Greg, and Max be in the accounting
department. Some of these people, say Amanda and Greg,
are on the bowling team. Since no one on the bowling
team is married, Amanda and Greg are definitely unmarried.
We don't know anything about whether Ellen and Max are
married.
Choice (A) is uncertain; it could be either true or false.
Choice (B) is uncertain as well; you don't know enough
about Ellen and Max.
Choice (C) is necessarily true; you know Amanda and Greg
are single.
Choices (D) and (E) are uncertain; the question doesn't say
anything about the number of employees in either group.
Thus, (C) is the correct answer choice.
16. c
Difficulty: Medium
Strategic Advice: Use the formula for averages to find the
missing pieces of an averages question.
Getting to the Answer:
The average is the sum of the terms divided by the number
of terms. So l 0 students got l 00, leaving 20 to get y scores
each (we can assume each will have the same score). We
set up the problem like this:
100(10) + 20y =92
30
17. B
1,000 + 20y = 2,760
20y = 1,760
y =88
Difficulty: Medium
Strategic Advice: Remember that a-2 is equal to - If you
a
have trouble simplifying the given expression, try picking a
number for a to make the problem more concrete.
Getting to the Answer:
l 02
a2 x a-2 = a2 x - = - 2
= l
02 a
Or, say a= 3:
l l 9
32 x - =9x-=-= l
32 9 9
18. c
Difficulty: High
Strategic Advice: In order to visualize some geometry
problems, it is necessary to draw the diagram split into
its pieces. The perimeter of each semicircle is half of the
perimeter (circumference) of the original circle plus the
length of the straight edge.