SAT Practice Test 6, Section 3: Questions 11  15
The following are worked solutions for the questions in the math sections of the SAT Practice Tests found in the Official SAT Study Guide.
It would be best that you go through the SAT practice test questions in the Study Guide first and then look at the worked solutions for the questions that you might need assistance in. Due to copyright issues, we are not able to reproduce the questions, but we hope that the worked solutions will be helpful.
11. Correct answer: 1, 11
Given:
A, B, C, D and E, lie on a line, not necessarily in that order
AB = 24
Point C is the midpoint of
Point D is the midpoint of
DE = 5
To find:
AE
Solution:
Sketch the approximate locations of the points on the line
AB = 24
C is the midpoint of , so AC = 12
D is the midpoint of , so AD = 6
There are two possible positions for E.
If E is between A and D then AE = 6 – 5 = 1
If E is between D and C then AE = 6 + 5 = 11
Answer: Either 1 or 11
12. Correct answer: 39
Given:
Sum of 5 consecutive integers = 185
To find:
The greatest of the 5 consecutive integers
Solution:
Topic(s): Consecutive integer problems
Let n be the greatest integer
n – 4 + n – 3 + n – 2 + n – 1 + n = 185
⇒ 5 n – 10 = 185 ⇒ 5n = 195 ⇒ n = 39
Answer: 39
13. Correct answer: 6500
Given:
Gross pay = $1,200 + 20% of the dollar amount of sales
Gross pay = $2,500
To find:
Dollar amount of sales
Solution:
Topic(s): Percent
The gross pay is given as $2,500
Let x = Dollar amount of sales
1,200 + 20% x x = 2,500 ⇒ 0.2x = 1,300 ⇒ x = 6,500
Answer: 6500
14. Correct answer: 5/18, .277, .278
Given:
Each wedge makes a 40% angle at the center of the disk
The weight of the uncut disk is 2.5 grams
To find:
The weight of each wedge
Solution:
Topic(s): Proportional word problem
The proportion of the weight should be the same as the proportion of the angle of the wedge to the full circle.
If 360º then 2.5 grams if 40º then how many grams?
360 → 2.5
40 →
Answer: 5/18, .277, .278
15. Correct answer: 2
Given:
x^{2} − y^{2} = 10
x + y = 5
To find:
x – y
Solution:
Topic(s): Difference of two squares
Use the difference of two squares to factorize
Answer: 2
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