Last visit was: 22 Dec 2024, 15:34 It is currently 22 Dec 2024, 15:34

Close

GRE Prep Club Daily Prep

Thank you for using the timer - this advanced tool can estimate your performance and suggest more practice questions. We have subscribed you to Daily Prep Questions via email.

Customized
for You

we will pick new questions that match your level based on your Timer History

Track
Your Progress

every week, we’ll send you an estimated GRE score based on your performance

Practice
Pays

we will pick new questions that match your level based on your Timer History

Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.

Close

Request Expert Reply

Confirm Cancel
Verbal Expert
Joined: 18 Apr 2015
Posts: 30475
Own Kudos [?]: 36819 [0]
Given Kudos: 26100
Send PM
Manager
Manager
Joined: 01 Apr 2022
Posts: 65
Own Kudos [?]: 15 [0]
Given Kudos: 79
Send PM
avatar
Intern
Intern
Joined: 29 Nov 2024
Posts: 3
Own Kudos [?]: 1 [0]
Given Kudos: 5
Send PM
Verbal Expert
Joined: 18 Apr 2015
Posts: 30475
Own Kudos [?]: 36819 [0]
Given Kudos: 26100
Send PM
|x-2| > 3 [#permalink]
Expert Reply
OE


As with all absolute value equations or inequalities, here you must solve twice:


\(\begin{array}{rlrl}
|x-2| & >3 & & \\
x-2 & >3 & \text { or } & \\
x-2 & <-3 \\
x & >5 & \text { or } & \\
x<-1
\end{array}\)


Even better, you could express the possible values of x on a number line:


Attachment:
GRE number line (9).jpg
GRE number line (9).jpg [ 11.77 KiB | Viewed 40 times ]


Quantity A is equal to the minimum possible value of |x − 3.5|. Another way to think of |x − 3.5| is the distance on a number line from x to 3.5. Look at 3.5 on the number line above and note the nearest possible distance that is greater than 5 (x may not be exactly 5, but it could be 5.000001, for instance, since there is no requirement that it be an integer).

Therefore, since the distance from 3.5 to greater than 5 is greater than 1.5, Quantity A is equal to greater than 1.5. That is, the minimum possible value of |x − 3.5| is 1.5 plus any very small amount—for instance, 1.5000001 would be a legal value. Quantity B can be conceived as the smallest distance from x to 1.5. Look at 1.5 on the number line—the nearest value is less than −1, which is more than 2.5 units away. Thus, the minimum possible value of |x − 1.5| is greater than 2.5.

If Quantity A’s minimum is just greater than 1.5 and Quantity B’s minimum is just greater than 2.5, Quantity B is larger. The answer is (B). You could also solve this problem by plugging in values, rather than using a number line. First, solve the inequality as above to get x > 5 or x < −1. Now try plugging in greater than 5, less than −1, as well as very small and very large numbers—that is, the extremes of both ranges for x (although you may be able to use a bit of logic beforehand to tell that you only want values very close to 1.5 and 3.5)—to make sure that you generate the smallest possible value for each quantity. Quantity A’s smallest value will be smaller than Quantity B’s smallest value.

The answer is (B).
Prep Club for GRE Bot
|x-2| > 3 [#permalink]
   1   2 
Moderators:
GRE Instructor
88 posts
GRE Forum Moderator
37 posts
Moderator
1115 posts
GRE Instructor
234 posts

Powered by phpBB © phpBB Group | Emoji artwork provided by EmojiOne